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