APA (7th ed.) Citation

United States. Forest Service. (1941). Influence of altitude and aspect on daily variations in factors of forest-fire danger. [s.n.].

Chicago Style (17th ed.) Citation

United States. Forest Service. Influence of Altitude and Aspect on Daily Variations in Factors of Forest-fire Danger. [Washington]: [s.n.], 1941.

MLA (9th ed.) Citation

United States. Forest Service. Influence of Altitude and Aspect on Daily Variations in Factors of Forest-fire Danger. [s.n.], 1941.