The Library of Congress >> Librarians, Archivists >> Standards >> MARC

Concise Formats - 2007 Archive >> Authority >> 00X >> 003

003 - Control Number Identifier (NR)

This is an ARCHIVED VERSION of the 2007 electronic edition of the MARC 21 Concise Formats. Please see loc.gov/marc/concise/ for the most up-to-date version of the electronic MARC 21 Concise Formats.

MARC code for the agency whose system control number is contained in field 001 (Control Number).

See Appendix G: Organization Code Sources for a listing of sources used in MARC 21 records.