United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with the Research Division of the College of Agricultural and Life Sciences, University of Wisconsin
By Clarence Lounsbury ... [and others] ; United States Department of Agriculture, Bureau of Chemistry and Soils ; in cooperation with New York State College of Agriculture
United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with Ohio Department of Natural Resources, Division of Soil and Water Conservation ... [and others]
By Robert Wildermuth...[and others] ; United States Department of Agriculture, Bureau of Chemistry and Soils ; in cooperation with the Ohio Agricultural Experiment Station
Date
[1938]
Series
United States. Bureau of Chemistry and Soils. [Soil survey report] Series 1930 ; no. 48