Although the date for formally implementing the 13-digit ISBN is January
1, 2007, they will actually begin to appear in LC records after October
1, 2004.
The full statement of the LC plan may be found at:
http://www.loc.gov/catdir/cpso/13digit.html
Anthony R.D. Franks
Acting Team Leader, Cooperative Cataloging Team
Library of Congress
202-707-2822 (voice)
202-252-2082 (fax)
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