Subscriber's guide to the MARC distribution service : specifications for magnetic tapes containing monographic catalog records in the MARC II format /
Library of Congress.Information Systems Office.
Washington : Library of Congress,
1968.
"Revised edition of 300 copies distributed free upon request to LC Card Division subscribers."
"October 1968."
Edition statement handwritten on t.p.
MARC formats
Exchange of bibliographic information
Data tapes