Suggested symbols for plans, maps, and charts.
By: June, 1938. National Resources Committee, Washington, D.C.
Publisher: U.S. Govt. Print. Off.
Published: 1938
Place of publication: Washington, D.C
Language: eng
Number of pages: 12
Subjects: Maps.; Charts.; Cartography.
Notes: Bibliography: p. 9-10.
Descriptive letterpress on versos of some of the plates.