Rosenthal, Alexander. The specialization and intensification of agriculture in Poweshiek County, IA and its contribution to soil erosion. 17 p. Seminar paper for Environmental History of Poweshiek County.
Rosenthal, Alexander. The specialization and intensification of agriculture in Poweshiek County, IA and its contribution to soil erosion. 17 p. Seminar paper for Environmental History of Poweshiek County.
Rosenthal, Alexander. The specialization and intensification of agriculture in Poweshiek County, IA and its contribution to soil erosion. 17 p. Seminar paper for Environmental History of Poweshiek County.