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data.bnf.fr - Bibliothèque nationale de France
data.bnf.fr gathers data from the different databases of the Bibliothèque nationale de France, so as to create Web pages about Works, Authors, Subjects and Places together with... -
MARC Codes List
Currently provides the MARC codes (http://www.loc.gov/standards/valuelist/) for languages, geographic areas, countries and forms of musical composition.