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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 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... -
LinkedLCCN
A wrapper for the Library of Congress' LCCN Permalink service which models the MARCXML output as linked data in RDF. -
MARC Codes List
Currently provides the MARC codes (http://www.loc.gov/standards/valuelist/) for languages, geographic areas, countries and forms of musical composition.