by Library of Congress. MARC Development Office.
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Information on the MARC system
Books, a MARC format
Composite MARC format
Films
Information on authorities
In process materials, a MARC format
Non-book materials
The audiovisual cataloging current
Audio-visual products from the Bureau of...
Cataloging of audiovisual materials
Indexing And Retrieval Of Nontext Inform...
Organizing audiovisual and electronic re...