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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... -
Open Library
About One web page for every book ever published. It's a lofty, but achievable, goal. To build it, we need hundreds of millions of book records, a brand new database... -
Yleinen suomalainen asiasanasto - YSA
The General Finnish Thesaurus (YSA) contains general, commonly used terms. The thesaurus is widely used in Finnish libraries and other organisations. -
datos.bne.es
Open bibliographic linked data from the Spanish National LIbrary including 4 million authority records, 2.4 million bibliographic records resulting in over 58 million triples....