Some obstacles to soil erosion control in western Iowa
Frey, John C.
Some obstacles to soil erosion control in western Iowa - Iowa 1952 - 945-1007 p. - Iowa Agricultural Experiment Station. Research Bulletin No. 391 .
Soil, Erosion
Some obstacles to soil erosion control in western Iowa - Iowa 1952 - 945-1007 p. - Iowa Agricultural Experiment Station. Research Bulletin No. 391 .
Soil, Erosion