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Concise Formats - 2009/2010 Archive >> Classification >> 00X >> 003

003 - Control Number Identifier (NR)

This is an ARCHIVED VERSION of the 2009/2010 electronic edition of the MARC 21 Concise Formats.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 present in field 001 (Control Number). See Organization Code Sources for a listing of organization code sources used in MARC 21 records.