Early American soil conservationists /
[by Angus McDonald].
- Washington, D.C. : U.S. Dept. of Agriculture, 1941.
- 63 p. : ill., ports. ; 23 cm.
- Miscellaneous publication / United States Department of Agriculture ; no. 449 .
- Miscellaneous publication (United States. Department of Agriculture) ; no. 449. .
Cover title. Contribution from Soil Conservation Service.