Classification. Subclass PG, in part Russian literature. - U. S. Library of Congress. Subject Cataloging Division (Washington U. S. Government Printing Office, 1948)
"Began as preliminary draft ... prepared in the 1930's by Clarence W. Perley, then chief of the Classification Division. Miss L. Belle Voegelein, editor of classification schedules, developed the present schedule."
Keywords: Classification--Books--Russian literature; Voegelein, Lily Belle, ed