Columbia subject headings:
Gases, Asphyxiating and poisonous--Physiological effect.
Gases, Asphyxiating and poisonous--Toxicology.
Toxicity testing.
Toxicology--Animal models.
Harvard subject headings:
Gases, Asphyxiating and poisonous--Physiological effect.
Gases, Asphyxiating and poisonous--Toxicity testing.
Toxicology--Animal models
Princeton subject headings: