The Copyright Card Catalog and the online files of the Copyright Office.
Series: Circular -- 23.; Circular (Library of Congress. Copyright Office) -- 23.
Publisher: Copyright Office, Library of Congress
Published: 1993
Place of publication: Washington, D.C
Language: eng
Subjects: Copyright -- Information services -- United States.; Catalogs, Card.; Online library catalogs.
Notes: Shipping list no.: 93-0370-P.

"May 1993"--P. [6].