Books by Library of Congress. Union Catalog Division
A tentative list of catalogs o
A tentative list of catalogs of microforms
United States author headings
Great Britain author headings
Great Britain author headings
Key to symbols used in the Uni
Key to symbols used in the Union catalog
Cooperative work of Card Divis
Cooperative work of Card Division, Union Catalogs, Cooperative Cataloging and Classification Service, and A.L.A. Cooperative Cataloging Committee
Symbols used in the National U
Symbols used in the National Union Catalog of the Library of Congress
Symbols of American libraries
Symbols of American libraries