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Hart-Davis, Adam (2012). Science: the definitive visual guide. London: Dorling Kindersley. pp. 284, 336. ISBN 978-1-4093-8314-7. 978-1-4093-8314-7
Andrady AL, Neal MA (July 2009). "Applications and societal benefits of plastics". Philos. Trans. R. Soc. Lond. B Biol. Sci. 364 (1526): 1977–84. doi:10.1098/rstb.2008.0304. PMC 2873019. PMID 19528050. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2873019
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Hart-Davis, Adam (2012). Science: the definitive visual guide. London: Dorling Kindersley. pp. 284, 336. ISBN 978-1-4093-8314-7. 978-1-4093-8314-7
Hart-Davis, Adam (2012). Science: the definitive visual guide. London: Dorling Kindersley. pp. 284, 336. ISBN 978-1-4093-8314-7. 978-1-4093-8314-7
Andrady AL, Neal MA (July 2009). "Applications and societal benefits of plastics". Philos. Trans. R. Soc. Lond. B Biol. Sci. 364 (1526): 1977–84. doi:10.1098/rstb.2008.0304. PMC 2873019. PMID 19528050. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2873019
Andrady AL, Neal MA (July 2009). "Applications and societal benefits of plastics". Philos. Trans. R. Soc. Lond. B Biol. Sci. 364 (1526): 1977–84. doi:10.1098/rstb.2008.0304. PMC 2873019. PMID 19528050. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2873019
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