Conservation in the Department of the interior.
Contributors: Wilbur, Ray Lyman, 1875-1949.; DuPuy, William Atherton, 1876-1941.
Publisher: U.S. Govt. print. off.
Published: 1931
Place of publication: Washington
Language: eng
Number of pages: 252
Subjects: Natural resources -- United States.; Conservation of natural resources.; United States -- Economic conditions -- 1918-1945.