An adaptation of the Library of Congress classification for use in geography and map libraries.

APA Citation

Gerlach, A. C., Library of Congress. Subject Cataloging Division., International Geographical Union. Commission on Library Classification of Geographical Books and Maps. (1956). An adaptation of the Library of Congress classification for use in geography and map libraries. Washington: Reproduced by the National Academy of Sciences of the United States of America.

MLA Citation

Gerlach, Arch C, Library of Congress. Subject Cataloging Division, and International Geographical Union. Commission on Library Classification of Geographical Books and Maps. An Adaptation of the Library of Congress Classification for Use In Geography And Map Libraries. Washington: Reproduced by the National Academy of Sciences of the United States of America, 1956.