http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Subject Cataloging Division, Processing Department.
"Editions of 1903-1934 published by Classification Division, Library of Congress, under title: Classification. Outline scheme of classes; rev. and enl. edition (1942) and 2d edition (1970) published by Subject Cataloging Division under title: Outline of the Library of Congress classification."
Classification. Outline scheme of classes