http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
directory of information resources in the United States: general toxicology
National Referral Center for Science and Technology (U.S.)
Directory of toxicological information resources. Arrangement in alphabetical order by name. Entries include toxicology-related interests, holdings, publications, and specific information services. Geographic, subject indexes.
Compiled for the Toxicology Information Program, National Library of Medicine.