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Library of Congress Subject Headings
LCSH has been actively maintained since 1898 to catalog materials held at the Library of Congress. By virtue of cooperative cataloging other libraries around the United States... -
National Agricultural Library Thesaurus
The NAL Thesaurus is an online vocabulary tool of agricultural terms in English and Spanish and is cooperatively produced by the National Agricultural Library, USDA and the... -
Library of Congress Name Authority File (NAF)
Bulk downloads of the Library of Congress Name Authority File (NAF). The current bulk download is only MADS/RDF. A SKOS/RDF download will be available in the near future. Two... -
LCSubjects.org Library of Congress Subject Headings
An alternative to http://id.loc.gov/: includes a SPARQL endpoint, faceted search
