--subdivision Toxicology under individual chemical substances, e.g. Copper--Toxicology
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Toxics -- See Poisons Works on the poisonous influence of individual chemical substances on man and animals are entered under the substance with the subdivision Toxicology, e.g. Mercury--Toxicology; Phosphorus--Toxicology.Works on the effect of poisons on plants are entered under Plants, Effect of poisons on; Plants, Effect of arsenic on; and similar headings. --individual poisons; also headings beginning with the word Poison
