U.S. Library of Congress. Subject Cataloging Division, Gale Research Inc, Runchock, R., & Droste, K. (1989). Class D. History: general and old world: Library of Congress classification schedules combined with additions and changes through 1988. Gale Research Inc.

U.S. Library of Congress. Subject Cataloging Division, Gale Research Inc, Rita Runchock, and Kathleen Droste. Class D. History: General and Old World: Library of Congress Classification Schedules Combined with Additions and Changes Through 1988. Detroit, Michigan: Gale Research Inc, 1989.

U.S. Library of Congress. Subject Cataloging Division, et al. Class D. History: General and Old World: Library of Congress Classification Schedules Combined with Additions and Changes Through 1988. Gale Research Inc, 1989.