Books by Library of Congress. MARC Development Office.
Systems and services [of the]
Systems and services [of the] Bibliographic Systems Office, January 1978
Information on authorities
Information on authorities
MARC distribution service-book
MARC distribution service-books (Canada)
Music, a MARC format
In process materials, a MARC format
MARC serials editing guide, CO
MARC serials editing guide, CONSER edition
Manuscripts: a MARC format
MARC user survey, 1972
Films: a MARC format
Films: a MARC format
Information on the MARC system
Books, a MARC format
Books, a MARC format