Relevant bibliographies by topics / Wool scouring

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters

Academic literature on the topic 'Wool scouring'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 January 2023

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Journal articles on the topic "Wool scouring"

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Czaplicki, Zdzisław, Edyta Matyjas-Zgondek, and Stanisław Strzelecki. "Scouring of Sheep Wool Using an Acoustic Ultrasound Wave." Fibres and Textiles in Eastern Europe 29, no. 6(150) (December 31, 2021): 44–48. http://dx.doi.org/10.5604/01.3001.0015.2721.

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The paper describes a method of scouring sheep wool using ultrasound.The inspiration to start work on the use of ultrasound in the process of scouring sheep wool was positive results that had already been achieved for alpaca wool. Due to the fact that sheep wool has many more impurites than alpaca wool, the scouring process is divided into two stages. The first involves the removal of faeces from the wool, which may be up to about 35% of the impurities of sheep wool, while the second stage involves the scouring cycle, wherein the remaining impurities are removed. The ultrasonic scouring process uses domestic merino wool heavily clad, particularly, by faeces. In this study, detergent solutions, alkali soap and sodium carbonate were used. The scouring of wool was carried out with a special apparatus equipped with an ultrasonic generator, at a frequency of 40 kHz. To determine the optimal conditions for scouring sheep wool that could affect the amount of impurities removed, the following parameters were examined: the effect of the scouring time, the concentration of detergents, and the scouring bath ratio. The study resulted in achieving optimal scouring parameters that ensured a satisfactory level of the removal of wool impurities.
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Westmoreland, D. J., A. C. Schlink, and J. C. Greeff. "Factors affecting wool scouring performance, yield and colour measurements of Western Australian fleece wools." Australian Journal of Experimental Agriculture 46, no. 7 (2006): 921. http://dx.doi.org/10.1071/ea05352.

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A benchtop scouring procedure was used to evaluate the ability of conventional detergent scouring systems to adequately clean fleece samples from a selection of Western Australian Merino wools. Sixteen fleeces were selected from the Western Australian Department of Agriculture resource flocks, covering a wide range in yield (49.2 to 77.5%), wax (7.3 to 26.9%), suint (4.9 to 11.6%), and dust (1.4 to 16.3%) contents. Using a simple detergent-based system, 50% of the fleeces were classified as effectively scoured, based on residual wax content. When scouring liquor was not refreshed between subsamples drawn from the same fleece, wool wax, staple length and dust content in the greasy fleece accounted for 93% of the variation in the rate of residual wax increase observed in sequential 10 g samples of wool. Residual ash content also increased but the greasy fleece parameters measured were not statistically significant predictors of residual ash changes. The rate of scoured wool colour change, when sequential samples of greasy wool from the same fleece were scoured without liquor change, could be predicted from greasy fleece yields. The scouring efficiency of the more difficult to scour wools was improved by the addition of sodium carbonate to the main scouring bowls.
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SHORTER, S. A. "Discussion on Wool Scouring." Journal of the Society of Dyers and Colourists 34, no. 8 (October 22, 2008): 163–66. http://dx.doi.org/10.1111/j.1478-4408.1918.tb01023.x.

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Turner, H. "Notes on Wool Scouring." Journal of the Society of Dyers and Colourists 50, no. 2 (October 22, 2008): 47–48. http://dx.doi.org/10.1111/j.1478-4408.1934.tb01812.x.

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Bateup, B. O., and J. J. Warner. "Selective Scouring of Dirt from Greasy Wool." Textile Research Journal 58, no. 12 (December 1988): 707–14. http://dx.doi.org/10.1177/004051758805801204.

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A strategy to increase dirt recovery from wool scouring liquors was tested in a series of five trials at commercial plants. By adding nonionic surfactant and alkaline builder to a cold or warm desuinting bowl (modified system) ahead of the usual hot scouring train, a large fraction of the dirt was scoured from the wool before the grease was removed. The first bowl liquors were rich in dirt and low in grease and had good dirt settling characteristics. Without the additions (control), the desuinting bowl removed large amounts of dirt only from coarser wools with relatively high water soluble and low grease contents. In a trial on merino fleece wool with low water solubles and high grease content, the scoured product from the modified system contained less residual ash and was whiter than the product from the control system.
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Romanovska, Tetiana, Мykola Oseiko, Svitlana Bazhay-Zhezherun, and Olena Yarmolitska. "Rational modes of wool scouring." Ukrainian Journal of Food Science 7, no. 2 (December 2019): 307–16. http://dx.doi.org/10.24263/2310-1008-2019-7-2-13.

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Erra, P., N. Azemar, M. R. Juliá, and C. Solans. "MICROEHULSIONS IN RAW WOOL SCOURING." Journal of Dispersion Science and Technology 13, no. 1 (February 1992): 1–12. http://dx.doi.org/10.1080/01932699208943291.

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Li, Qing, Christopher J. Hurren, and Xungai Wang. "Ultrasonic assisted industrial wool scouring." Procedia Engineering 200 (2017): 39–44. http://dx.doi.org/10.1016/j.proeng.2017.07.007.

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Bateup, B. O. "Selective Scouring of Dirt from Greasy Wool." Textile Research Journal 58, no. 11 (November 1988): 667–72. http://dx.doi.org/10.1177/004051758805801108.

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Laboratory experiments using samples of eleven Australian wools representing five different classes (merino fleece, lambs, merino pieces, crossbred pieces, and pieces and bellies) showed that the dirt could be selectively removed in a warm (35 °C) suint bowl containing nonionic surfactant and alkaline builder (modified suint scouring). Removal of grease was low, and in consequence the suint bowl liquor could be readily centrifuged to give good recovery of dirt as an easily disposable spadeable sludge. In a suint bowl without additives (control), the different wools displayed two distinct modes of behavior, which could be correlated with greasy wool characteristics. The fine fleece wools gave low dirt removal; the coarser wools gave much higher dirt removal and overall recovery. Only a small amount of recoverable grease was removed. This difference in the behavior of different wools may explain the varying ideas about the effectiveness of suint bowls in industry and provides an opportunity to improve the overall efficiency of the scouring operation.
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Wang, Lai Li, Xue Mei Ding, and Xiong Ying Wu. "The Water Footprint of Wool Scouring." Key Engineering Materials 671 (November 2015): 65–70. http://dx.doi.org/10.4028/www.scientific.net/kem.671.65.

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Raw wool contains high percentage by weight of natural contaminants. It is usually treated by a scouring process in the first stage of textile processing. Wool scouring process consumes large quantities of fresh water and produces concentrated effluent with very high oxygen demand, aggravating the water resource shortage and environmental impacts. Water footprint (WF) is a multidimensional indicator that shows water consumption volumes by source and polluted volumes by type of pollution. This study discusses the environmental impacts assessment of wool scouring process based on the WF theory. Through cases study, it was found that chemical oxygen demand (CODCr) was the most critical pollutant associated with the largest pollutant-specific original grey WF (WFori, grey), while NH3-N was the most critical pollutant associated with the largest pollutant-specific residuary grey WF (WFres, grey). The average WFori, greyof wool scouring process was 51878 m3/d, approximately 291 times of blue WF (WFblue). After treatment of the scouring effluent through floatation reflux-biological contact oxidizing technology, the WFori, greyreduced to 558 m3/d. Refluxing and regulating, oil removal were two important processes that contributed largely to effluent treatment as they reduced WFori, greyby 28537 m3/d and 23171 m3/d, respectively.
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Dissertations / Theses on the topic "Wool scouring"

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Caunce, James Frederick Physical Environmental &amp Mathematical Sciences Australian Defence Force Academy UNSW. "Mathematical modelling of wool scouring." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Physical, Environmental and Mathematical Sciences, 2007. http://handle.unsw.edu.au/1959.4/38650.

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Wool scouring is the first stage of wool processing, where unwanted contaminants are removed from freshly shorn wool. In most scouring machines wool is fed as a continuous mat through a series of water-filled scour and rinse bowls which are periodically drained. The purpose of this project is to mathematically model the scour bowl with the aim of improving efficiency. In this thesis four novel models of contaminant concentration within a scour bowl are developed. These are used to investigate the relationships between the operating parameters of the machine and the concentration of contamination within the scour bowl. The models use the advection-diffusion equation to simulate the settling and mixing of contamination. In the first model considered here, the scour bowl is simulated numerically using finite difference methods. Previous models of the scouring process only considered the average steady-state concentration of contamination within the entire scour bowl. This is the first wool scouring model to look at the bowl in two dimensions and to give time dependent results, hence allowing the effect of different drainage patterns to be studied. The second model looks at the important region at the top of the bowl - where the wool and water mix. The governing equations are solved analytically by averaging the concentration vertically assuming the wool layer is thin. Asymptotic analysis on this model reveals some of the fundamental behaviour of the system. The third model considers the same region by solving the governing equations through separation of variables. A fourth, fully two-dimensional, time dependent model was developed and solved using a finite element method. A model of the swelling of grease on the wool fibres is also considered since some grease can only be removed from the fibre once swollen. The swelling is modelled as a Stefan problem, a nonlinear diffusion equation with two moving boundaries, in cylindrical coordinates. Both approximate, analytical and a numerical solutions are found.
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Lu, Xue Fen. "Wool scouring and sludge incineration." Thesis, University of Huddersfield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368210.

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Savage, Matthew John. "Integrated Treatment Processes For Primary Wool Scouring Effluent." Thesis, University of Canterbury. Chemical and Process Engineering, 2003. http://hdl.handle.net/10092/1125.

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The increasing cost of effluent treatment in the wool scouring industry is rapidly becoming a determining factor in the viability of existing scouring operations and new installations alike. This thesis details the development of an integrated effluent treatment process capable of treating the worst polluted effluent from a wool scour "heavy flow-down", to the point where it can either be economically discharged to local trade waste sewer, or directly discharged to river or ocean outfall with minimal environmental impact. The existing proprietary chemical flocculation process, Sirolan CF™, was improved by the addition of a bio-flocculation stage and turbidity monitoring and control, and the product from this process fed to an aerobic biological treatment system based upon the traditional activated sludge process. The biological treatment process was found to remove up to 98% of the BOD5 loading from the pre-treated liquor with a hydraulic residence time of at least 50 hours being required in the aerobic digestion vessels. A residual biorefractory COD of approximately 3,600mg/L was identified which could not be removed by biological treatment. When operating continuously, the biological process was observed to metabolically neutralise the pH 3.0 - 4.5 feed from the chemical flocculation system to pH > 7.0 without the need for supplemental addition of neutralising agents such as sodium hydroxide. This in itself provides a significant economic incentive for implementation of the process. Kinetic analysis of the biological process carried out under controlled laboratory conditions using a Bioflo 3000 continuous fermentor showed that the bio-chemical process followed substrate inhibition kinetics. An appropriate kinetic model was identified to represent the behaviour of the substrate degradation system, and modified by inclusion of a pseudo toxic concentration to account for the effect of pH inhibition upon the biological growth rate. The process was verified both at pilot plant scale and at demonstration plant scale at an operational wool scour. The demonstration plant was of sufficient size to handle the full heavy effluent flow-down from a small wool scour. At the time of publishing three full-scale effluent treatment systems based on this research had been sold to both domestic and international clients of ADM Group Ltd. who funded the research.
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Rapakgadi, Jim. "Detection of contaminants in wool bales using nuclear techniques." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/993.

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To improve the quality and the marketability of wool and mohair, it is important to encourage, ensure and preferable certify that the baled fibre is free of contaminants. Anything other than the fibre that is within the bale can be classified as contaminants; this may be in the form of metal and wooden objects, plastic materials, paints, and vegetable matter such as grass and seed. The internationally accepted method for detecting and classifying these contaminants are highly labour intensive and costly. The ultimate goal of the present research is to develop a non-invasive and nondestructive technique that can be used to detect contaminants, particularly plastic (polymer) materials within wool and mohair bales. Such a technique can be implemented in the wool industry and also could be applied to other fibres, such as cotton. The immediate objective of this study was to evaluate the capability and the limitation of X-rays as a technique to detect such contaminants. It was found that X-rays were suitable for detecting foreign objects, or contaminants, such as metals, but not for detecting plastic materials, such as polypropylene and polyethylene.
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Wong, Wai Yin. "The suitability of a rotating fluidised bed (RFB) for incineration and gasification." Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370081.

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Setipa, Tsepang Benjamine. "Investigating the benefits of establishing a wool scouring plant in Lesotho." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/20428.

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Lesotho’s current production of raw wool is sold to global markets through South African wool merchants. Lesotho does not have any wool processing facilities and as such, the wool from Lesotho gets processed in South Africa or sold to international markets like China where it is processed. Since 2012, the government of Lesotho has publicly showed interest in developing a wool scouring plant that would process locally produced wool instead of selling it in its raw unprocessed form to international markets. The understanding by the Lesotho government was underpinned by perceived economic benefits that could be realised by the country and the wool industry of Lesotho, if the wool scouring plant was developed. The wool industry is important to the economy of Lesotho and as such, wool production in Lesotho contributes to the living standards in the rural areas as their lives are highly depended on the production of wool. A vibrant wool industry in Lesotho therefore has the potential to contribute to the growth of the economy, the manufacturing sector, employment at both the herder and the manufacturing levels, and the export sector. Wool scouring or wool washing is the early stage processing of greasy wool. The purpose of wool scouring is to extract grease, dirt, unpleasant smell and other foreign matter from the greasy wool. Raw wool fibers contain fat, suint (sheep sweat salts), plant material and minerals. It is therefore necessary to remove these from wool by scouring with a combination of detergents, wetting agents and emulsifiers before further processing. Wool can lose up to 30% of its original weight during this process. The Lesotho government feels that there is a need to develop a wool scouring plant in Lesotho because Lesotho does not benefit from the South African wool scouring processes and anything that happens post that process. Given that no viability studies had been conducted in Lesotho to motivate the government’s interest in developing a wool scouring plant, this study was conducted with the aim to investigate the benefits of developing a wool scouring plant in Lesotho. The research design employed in this study was a mixed method, which is a combination of positivism (quantitative) and interpretivism (qualitative) data collection and analysis in parallel form. In terms of the qualitative component of the study, structured interviews were conducted, governed by in-depth interview guidelines developed by the researcher. A questionnaire was used for the qualitative component of the study. Among some of its findings and recommendations the study recommends that there is insufficient wool produced in Lesotho to support a local wool scouring plant, the government of Lesotho should rather focus their effort on the improvement of the wool production value chain to assist farmers. The study finds no grounds for the justification of the development of a local scouring plant in Lesotho and recommends that for such propositions to be made publicly, at least proper groundwork should be undertaken to investigate the technical feasibility of developing the scouring plant.
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Charles, (nee Lapsirikul) Wipa. "Anaerobic bioflocculation as a mechanism for the removal of grease from wool scouring effluent." Thesis, Charles (nee Lapsirikul), Wipa (1994) Anaerobic bioflocculation as a mechanism for the removal of grease from wool scouring effluent. PhD thesis, Murdoch University, 1994. https://researchrepository.murdoch.edu.au/id/eprint/39184/.

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Effluent produced by the wool scouring process is highly polluted with emulsified grease, dirt particles, salts, and detergent. The major problem in treating this waste stream is the wool grease which is resistance to biodegradation. The removal of grease from the effluent would lead to a more readily degradable waste stream, and therefore suitable for further biological treatment processes. This study aimed to investigate anaerobic destabilisation (flocculation), rather than degradation, of wool grease emulsion from wool scouring effluent (WSE). The process therefore can serve as a pretreatment step, prior to a conventional biological process. The results from this study show that emulsified wool grease in WSE could be removed by bioflocculation under anaerobic conditions. After 110 days of continuous operation, a two-stage anaerobic process treating a high grease (> 10 g/L) effluent removed 70 to 90% grease and approximately 60 to 86% COD at a combined hydraulic residence time (HRT) of 4 to 10 days. With low grease (<10 g/L) effluent grease removal was reduced. At a HRT of 3 days a single stage anaerobic process removed 40 and 44% grease (37 and 43% COD) at 20 °C and 37 °C respectively. Since the supernatant of the treated effluent still contained residual grease of over 1.5 g/L, further purification was necessary. The supernatant was readily treated by an aerobic activated sludge process, reducing the grease concentration from about 1.5 g/L to less than 0.1 g/L, in the final effluent, with an HRT of 3 days. Methane production and volatile fatty acids consumption of both the above anaerobic systems were negligible. The majority of the grease was removed by flocculation as a result of anaerobic bacterial activity. The mechanisms of this process were investigated by a series of batch experiments. It was found that: (1) appropriate gentle mixing between wool scouring effluent (WSE) and anaerobic sludge resulted in the absorption of wool grease from the liquid phase to the sludge phase, (2) further estabilisation of the wool grease emulsion was obtained when the mixed liquor is left undisturbed. The process thus required a short gentle mixing period of approximately 15 minutes to enable complete contact between the sludge and WSE, and a longer settling period of 2 to 4 days to provide appropriate time for the microbes to destabilise wool grease emulsion and transfer it to the sludge phase. The process of destabilising the wool grease from wool scouring liquor was found to result from the activities of suspended microbes in the anaerobic sludge, which could successfully grow in WSE, rather than the bulk biomass as required in a conventional anaerobic digestion process. General microscopic observation indicated that during the process of bioflocculation a large number of mixed bacterial cells (> 1Q8 cells/nil) were present in the supernatant and only a small number appeared within the flocculated grease. No evidence of bacterial cell aggregation was observed in the process. It was hypothesised that the mechanism involved the partial degradation of detergent. Detergent analysis revealed that anaerobic microbes' (taken from the sludge of a municipal wastewater treatment plant) had an ability to partially degrade non-ionic surfactants (nonylphenol polyethoxylates - NPEO) by shortening the hydrophilic ethoxylate chain, resulting in the reduction of surfactant properties. This is likely to be one factor causing coagulation and subsequent flocculation of wool grease in the liquor. Other factors such as production of biopolymers and enzymes by microbes may also play a role, and should be further investigated as they beyond the scope of this thesis. Ten different bacteria strains were isolated from the supernatant of successfully flocculated WSE samples. Six strains were found to grow in raw WSE as a pure culture. Only three strains caused some flocculation of wool grease, although the reduction of grease from the supernatant was not as effective (20-30%) as that using the mixed culture (60-80%). However, the results were not reproducible when different WSE samples were used, thus no definite conclusions could be obtained from this experiment. The efficiency of anaerobic bioflocculation was found to vary greatly (30% to 80% grease removal) depending on the source of wool scouring effluent The concentration of bacterial substrate, grease and free detergent (rather than total detergent) were all found to effect the efficiency of the process. At a constant loading rate, the efficiency of the process was found to increase with increased grease concentration in WSE. A rationalisation of the scouring process to minimise detergent use and produce higher concentration grease and suint WSE is a likely benefit of bioflocculation process. These findings lead to the recommendation of a proposed treatment scheme. The main conclusion drawn from this study is that the anaerobic biological removal of wool grease in WSE is due to the destabilisation of the wool grease emulsion resulting in grease flocculation. Since the process does not require further additives, such as chemical flocculant or oxygen, the removal of the bulk of the grease by simple anaerobic bioflocculation appears to be a useful part of an economic treatment system.
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Poole, Andrew James. "Biological treatment of highly polluted industrial effluent: With application to the wool scouring industry." Thesis, Poole, Andrew James (1999) Biological treatment of highly polluted industrial effluent: With application to the wool scouring industry. PhD thesis, Murdoch University, 1999. https://researchrepository.murdoch.edu.au/id/eprint/52751/.

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The effluent from the scouring of raw wool is the most polluted in the textile processing industry. It consists of a stable emulsion of wool wax in an aqueous medium containing dissolved organic and inorganic pollutants. The typical concentration of solvent extractable material is 9000 mg/L with a chemical oxygen demand (COD) of 30000 mg/L. The effective treatment of this effluent is necessary to ensure the future environmental and economic sustainability of the wool industry, however the effluent has so far eluded any universally acceptable means of treatment. This study investigates two new biological approaches to treating wool scouring effluent. In accord with the contemporary trend toward treatment processes consisting of several unit processes, the biological systems studied were designed to form part of an overall combined technologies treatment package. The first process biologically destabilises the wax emulsion, which allows the solvent extractable material to be recovered by centrifugation, whilst simultaneously degrading the biodegradable soluble pollutants. Aerobic continuous culture treatments achieved a 90% decrease in COD with over 99% removal of solvent extractable material. Retention times of less than 40 h were used with both laboratory scale (1.4 L) and pilot scale (100 L) reactors which operated without sludge recycle. A spadable sludge was produced which was approximately 22% by volume of the effluent. The removal of COD occurred non-stoichiometrically, requiring only one third of the amount of oxygen which would have been required by a conventional aerobic biological system. Emulsion destabilisation occurred partly due to degradation of the detergent used to stabilise the emulsion. However about 40% of destabilisation occurred before substantial degradation was shown in an initial destabilisation phase which corresponded to cleavage of the wool wax esters. The second process complements a chemical flocculation procedure known as Sirolan CF. The Sirolan CF process removes virtually all of the wool wax and other insoluble material from the aqueous effluent to form a sparable sludge. However the soluble organic compounds are not removed and so the aqueous effluent retains 25% of the original COD and requires further treatment. In this study, a survey to characterize the Sirolan CF effluent was conducted over a six month period and found the effluent had a high organic load with a COD of 5750 mg/L and a low biochemical oxygen demand (BOD5)/COD ratio of 0.29. Aerobic biological treatment was found to remove up to 65% of the COD and essentially all BOD5, detergent activity, and solvent extractable material. The corresponding growth yield coefficient was 0.5 to 0.75 mg biomass produced per mg of COD degraded. The treated effluent retained a COD of 2000 mg/L and an ammonia concentration 147 mg/L, which has a theoretical oxygen demand of 553 mg/L and necessitates discharge of the treated effluent to sewer. Continuous culture treatments used laboratory scale (3 L) and pilot scale (100 L and 3000 L) reactors without sludge recycle. It was found that retention times of about two days would be required for a full scale system due to the high oxygen demand of the effluent. The Sirolan CF process coupled with biological treatment gave a theoretical total COD removal of over 90% with essentially complete removal of solvent extractable material from the aqueous effluent. The successful operation of both the microbial destabilisation and Sirolan CF effluent treatment processes at pilot scale indicated that they could be successfully developed into full scale processes and used industrially. Both processes offer a high degree of treatment, and are suitable to be integrated into combined technology treatment processes for the treatment of this highly polluted wastewater.
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GUO, WEN LUNG, and 郭文龍. "The Study of Cotton/Wool Fabrics by Scouring and Bleaching Processes in One Bath." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/67151619224516375326.

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Books on the topic "Wool scouring"

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Spies, Peter. Anaerobe Behandlung fetthaltigen Abwassers am Beispiel einer Wollwäscherei. Hannover: Institut für Siedlungswasserwirtschaft und Abfalltechnik der Universität Hannover, 1986.

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Warner, J. J. The recovery of dirt from wool-scouring effluent by treatment in a decanter centrifuge. Belmont,Victoria: CSIRO, 1985.

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Jamieson, R. G. The effect of different scouring and rinsing treatments on the colour of scoured wool. Christchurch: WRONZ, 1985.

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Jamieson, R. G. The effect of different scouring and rinsing treatments on the colour of scoured wool. Christchurch: Wronz, 1986.

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Egbert, Mary. Camaj Fiber Art's Scouring and Fiber Prep Guide the Art of Washing Wool, Mohair and Alpaca Scour Wool Like a Boss: Where Art and Science Meet for Excellent Outcomes. Independently Published, 2019.

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Egbert, Mary. Camaj Fiber Art's Complete Scouring and Fiber Prep Guide the Art of Washing Wool, Mohair and Alpaca Scour Wool Like a Boss: The Art and Science Meet for Excellent Outcomes. Independently Published, 2019.

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Parker, Philip M. The World Market for Iron or Steel Wool, Pot Scourers, and Iron or Steel Scouring or Polishing Pads and Gloves: A 2007 Global Trade Perspective. ICON Group International, Inc., 2006.

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The World Market for Iron or Steel Wool, Pot Scourers, and Iron or Steel Scouring or Polishing Pads and Gloves: A 2004 Global Trade Perspective. Icon Group International, Inc., 2005.

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Book chapters on the topic "Wool scouring"

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"wool scouring test." In The Fairchild Books Dictionary of Textiles. Fairchild Books, 2021. http://dx.doi.org/10.5040/9781501365072.18049.

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