Environmental Working Group's List of the Dirty Dozen

U.S EPA Pesticide Fact Sheets. National Pesticide Information Center, 'Pesticide Fact Sheets'

PAN Pesticides Database,'Chemicals'

USDA National Nutrient Database for Standard Reference Search

Consumers Union Testing of Organic Produce

Agency for Toxic Substances and Disease Registry, 'Public Health Statement for DDT,DDE, and DDD' section 1.6

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