Classification : class Z : bibliography and library science.
Library of Congress.Subject Cataloging Division.
Library of Congress.Classification Division.Classification. Class Z: Bibliography and library science.
Library of Congress.Subject Cataloguing Division.
Gale Research Company.
Washington : U.S. Govt. Print. Off.,
1965.
With supplementary pages ["Additions and changes to October 1964"]
Classification
Classification
Classification, Library of Congress.