Cover title: MARC II."January 1968."Reissued to subscribers to LC MARC tapes between 1968 and 1969 under the title: Subscriber's guide to the MARC Dis...
Reissued to subscribers to LC MARC tapes between 1968 and 1969 under the title: Subscriber's guide to the MARC Distribution Service; later edition published under the title: Books, a MARC format.