APA (7th ed.) Citation

United States. Forest Service. Intermountain Region, Lewis, M. H., & Spaun, C. (1941). Salmon National Forest, West Half, Idaho (Revised 1941.). U.S. Dept. of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Intermountain Region, M. H. Lewis, and C. Spaun. Salmon National Forest, West Half, Idaho. Revised 1941. [Washington, D.C.]: U.S. Dept. of Agriculture, Forest Service, 1941.

MLA (9th ed.) Citation

United States. Forest Service. Intermountain Region, et al. Salmon National Forest, West Half, Idaho. Revised 1941. U.S. Dept. of Agriculture, Forest Service, 1941.