Conquest of the land through seven thousand years
By: by  W. C. Lowdermilk.
Edition: Revised slightly April, 1950.
Publisher: U.S. Department of Agriculture, Soil  Conservation Service
Published: 1950
Place of publication: Washington, D.C
Language: eng
Number of pages: 38
Subjects: Soil conservation.; Agricultural conservation.; Land use.; Soil erosion.