Context

Context of Soil survey of Putnam County, Indiana, part 1. by Earl D. Fowler, U.S. Department of Agriculture, in charge and H.R. Adams, Purdue University Agricultural Experiment Station. Part 2. The management of Putnam County soils / by A.T. Wiancko and S.D. Conner, Department of Agronomy, Purdue University Agricultural Experiment Station ; United States Department of Agriculture, Bureau of Chemistry and Soils in cooperation with the Purdue University Agricultural Experiment Station
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