Classification. Class P, subclasses PJ-PM : Languages and literatures of Asia, Africa, Oceania, America, mixed languages, artificial languages (with supplementary pages) / by Library of Congress. Subject Cataloging Division.
First ed. published in 1935 by the Classification Division. "Additions and changes to July 1964": 191 p. at end. Kept up to date by the Division's L.C. classification--additions and changes, and by 2 publications irregularly issued by Gale Research Company entitled: Library of Congress classification schedules--a cumulation of additions and changes, Class P, subclasses PJ-PM; and Library of Congress classification schedules combined with additions and changes.