MARC 21 format for bibliographic data : including guidelines for content designation /
Library of Congress.Network Development and MARC Standards Office.
National Library of Canada.Standards and Support.
Washington [D.C.] : Library of Congress, Cataloging Distribution Service,
1999.
Rev. ed. of: USMARC format for bibliographic data. 1994 ed. c1994; and, Canadian MARC communication format for bibliographic data. 1994.
MARC formats.