Forty years of Western forestry :
a history of the movement to conserve forest resources by cooperative effort, 1909-1949 : one forest--under two flags /
[editorial committee, E. T. Clark [and others].].

APA Citation

Clark, E. Treat., Western Forestry and Conservation Association (U.S.). (1949). Forty years of Western forestry: a history of the movement to conserve forest resources by cooperative effort, 1909-1949 : one forest--under two flags. Portland: Western Forestry & Conservation Association.

MLA Citation

Clark, Elias Treat, 1886-, and Western Forestry and Conservation Association (U.S.). Forty Years of Western Forestry: a History of the Movement to Conserve Forest Resources by Cooperative Effort, 1909-1949 : One Forest--under Two Flags. Portland: Western Forestry & Conservation Association, 1949.