TOXLINE - Extensive array of references to literature on biochemical, pharmacological, physiological, and toxicological effects of drugs and other chemicals.

EMIC (Environmental Mutagen Information Center) - Current and older literature on agents tested for genotoxic activity.

DART/ETIC (Developmental and Reproductive Toxicology and Environmental Teratology Information Center) - Current and older literature on developmental and reproductive toxicology.

PubMed - National Library of Medicine's search service that provides access to over 10 million citations in MEDLINE, PreMEDLINE, and other related databases, with links to participating online journals.