This Code List Help is prepared by The Library Corporation, Inwood, WV, based on Source Codes for Vocabularies, Rules, and Schemes, at, which was prepared by the Network Development and MARC Standards Office at the Library of Congress, Washington, DC.

As updates are issued by the Library of Congress, this Code List Help will be updated by The Library Corporation.  For version information and the current status of this document, see the edition information.

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