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004 - Control Number for Related Bibliographic Record (NR)

MARC 21 Holdings - Full
January 2000

Indicators and Subfield Codes
No indicators or subfield codes.


System control number of the MARC bibliographic record for which a separate holdings record was created.

Field 004 links a separate holdings record to its related bibliographic record. For interchange purposes, documentation of the structure of the control number and input conventions are provided to exchange partners by the organization initiating the interchange. The related MARC bibliographic record is distributed to exchange partners prior to the distribution of a separate holdings record.

An organization receiving a separate holdings record may move the control number for the related bibliographic record of the distributing system from field 004 to one of the following 0XX control number fields and place its own related bibliographic record control number in field 004:

010 Library of Congress Control Number
014 Linkage Number
016 National Bibliographic Agency Control Number
035 System Control Number


Embedded Holdings Information - When holdings information is embedded in a related MARC bibliographic record, field 004 is not used.

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