APA (7th ed.) Citation

United States. Weather Bureau. (1941). Climatological data for the United States by sections, v. 28, no. 7; July 1941. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Weather Bureau. Climatological Data for the United States by Sections, V. 28, No. 7; July 1941. [Washington]: [publisher not identified], 1941.

MLA (9th ed.) Citation

United States. Weather Bureau. Climatological Data for the United States by Sections, V. 28, No. 7; July 1941. [publisher not identified], 1941.