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The Library of Congress does not administer or distribute International Standard Book Numbers (ISBNs).
For ISBN assistance, please contact Bowker, the U.S. ISBN Agency External , online or by phone at: (877) 310-7333.
For more information about the services the Library of Congress provides to the publishing community, such as: creating Cataloging in Publication (CIP) data; assigning Library of Congress Control Numbers (LCCNs) to books; assigning ISSNs to serial publications; and registering and depositing materials with the Copyright Office, please see the Library's Publishers page .
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