Columbia subject headings:
Organophosphorus compounds--Safety measures.
Organophosphorus compounds--Toxicology.
Pesticides--Environmental aspects.
Pesticides--Physiological effect.
Pesticides--Toxicology.
Harvard subject headings:
Organophosphorus compounds--Safety measures.
Organophosphorus compounds--Toxicology.
Pesticides--Environmental aspects
Pesticides--Physiological effect
Pesticides--Toxicology
Princeton subject headings: