Helpful Links
To convert 10-digit ISBNs to 13-digit ISBNs:
To access the ISBN User Manual:
To access FAQs about assigning ISBNs:
To learn more about the international administration of the ISBN system:
For Copyright, Library of Congress Control Number (LCCN), and the Cataloging in Publication Program (CIP), please contact the Library of Congress:
For information regarding bar coding and other publishing industry standards: