Columbia subject headings:
Chemicals--Health aspects.
Chemicals--Physiological effect.
Hazardous substances--Health aspects.
Hazardous substances--Physiological effect.
Toxicology.
Harvard subject headings:
Chemicals--Health aspects.
Chemicals--Physiological effect
Hazardous substances--Health aspects.
Hazardous substances--Physiological effect.
Toxicology.
Princeton subject headings: