soils surveyed by Jay A. Bonsteel, Geo. N. Coffey, R.C. Lloyd and W.H. Knox ; [prepared by] U.S. Dept. of Agriculture, Bureau of Soils [and] Illinois Agricultural Experiment Station
Published as No. 24 in Field operations of the Bureau of Soils, 1902 / U.S. Bureau of Soils. Washington, D.C. : U.S. G.P.O., 1903. Also in Serial Set 4545.