Outline of the Library of Congress classification.
Library of Congress.Subject Cataloging Division.
Library of Congress.Classification Division.Classification. Outline scheme of classes.
Library of Congress.Subject Cataloging Division.
Washington : Library of Congress,
1970.
Issued, 1903-1934, by Classification Division, Library of Congress under title: Classification. Outline scheme of classes; beginning with 3d ed. (1975) issued by Subject Cataloging Division under title: LC classification outline.
Classification, Library of Congress.