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The Library of Congress > Cataloging Distribution Service > MARC Documentation > MARC 21 Concise Formats
MARC 21 Concise Formats: 2011 Edition
Network Development and MARC Standards Office, Library of Congress
Publication Date:
Print, looseleaf
This publication is now out of print.
Concise Formats is available free online at

Consult the "format changes" appendix for each online format document for guidance on the fields and other areas of the format that have changes.
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Available on the Web

Introduction to MARC Documentation

Machine-Readable Cataloging (MARC) is the standard in library automation, forming the backbone of today's automated library systems, networks, and bibliographical utilities. The Library of Congress MARC products set the standard for MARC cataloging documentation. Available in Cataloger's Desktop and free online on the Library's MARC web site,

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