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Helpful Links

To convert 10-digit ISBNs to 13-digit ISBNs:

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To access the ISBN User Manual:

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To access FAQs about assigning ISBNs:

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To learn more about the international administration of the ISBN system:

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For Copyright, Library of Congress Control Number (LCCN), and the Cataloging in Publication Program (CIP), please contact the Library of Congress:

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For information regarding bar coding and other publishing industry standards:

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