Columbia subject headings:
Hazardous wastes.
Pesticides--Environmental aspects.
Toxicology.
Harvard subject headings:
Factory and trade waste--Environmental aspects
Factory and trade waste--Toxicology.
Hazardous substances--Environmental aspects.
Pesticides--Environmental aspects
Pesticides--Toxicology
Princeton subject headings:
Factory and trade waste--Environmental aspects.
Hazardous substances--Environmental aspects.
Pesticides--Environmental aspects.