"This cumulation includes the revisions to July 1967 ... and the revisions published in LC Classification-additions and changes, list 139 (July-Sept.,1965) through list 248 (Oct.-Dec.,1992)" - t.p. verso.
Revisions to: Classification: class P, subclasses PB-PH, modern European languages. Washington: Library of Congress, 1933.
Library of Congress classification schedules : a cumulation of additions and changes through 1992. Class P, subclasses PB-PH, modern European languages. ISBN 0810382504. Published by Gale Research in 1993. Publication and catalogue information, links to buy online and reader comments.