Shows soil types classification by colors and symbols. 'Field operations Bureau of Soils.' Scale 1:63,360. 1 inch = 1 miles. U.S. Dept. of Agriculture, Bureau of Soils; Purdue University, Agricultural Experiment Station; Soils surveyed by Mark Baldwin and J.A. Slipher, U.S. Dept. of Agriculture and S.C. Jones, Purdue University Agricultural Experiment Station.
Baldwin, Mark (Cartographer), Slipher, J. A., and Jones, S. C. (Sadocie Conellee),1880-cartographer.