LC receives reports for duplicate records authenticated with any of the following authentication codes, including any combination of the codes:

042 lc

042 lcd

042 nssdp

042 msc

042 nst

LC also receives reports for duplicate records authenticated by both the Library of Congress and the National Library of Canada.

Address report forms to:

Serials Cataloging Sections

Serial Records Division

Library of Congress

Washington, DC 20540-4160

See also:

C7.4. Reporting Duplicate Records