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cottrell.aspx%7Carchivedate=July
cottrell.aspx%7Carchivedate=July
https://web.archive.org/web/20160712164526/http:/www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/public-and-environmental-health/environmental-chemistry/cottrell.aspx%7Carchivedate=July
Frederick Gardner Cottrell
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cottrell.aspx%7Carchivedate=July
https://web.archive.org/web/20160712164526/http:/www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/public-and-environmental-health/environmental-chemistry/cottrell.aspx%7Carchivedate=July