Context

Context of Soil survey of Gibson County, Indiana, T.M. Bushnell, of the Purdue University Agricultural Experiment Station, in charge and W.E. Tharp of the U.S. Department of Agriculture. Part II. The management of Gibson County soils / A.T. Wiancko and S.D. Conner, of the Department of Soils and Crops, Purdue University Agricultural Experiment Station ; U.S. Department of Agriculture, Bureau of Soils in cooperation with the Purdue University Agricultural Experiment Station
Processing Feedback ...