Columbia subject headings:
Food contamination.
Pesticide residues in food.
Pollutants.
Pollution.
Harvard subject headings:
Food contamination--Periodicals
Food contamination.
Pesticide residues in food--Periodicals.
Pesticide residues in food.
Pollution--Periodicals
Pollution.
Princeton subject headings:
Environmental toxicology.
Pesticides--Environmental aspects.
Pollution.