by J. W. Moon ... [and others] ; United States Department of Agriculture, Bureau of Chemistry and Soils ; in cooperation with the Michigan Agricultural Experiment Station and the Michigan Department of Conservation, Land-Economic Survey
United States Department of Agriculture, Natural Resources Conservation Service and Forest Service ; in cooperation with Michigan Agricultural Experiment Station
by Z.C. Foster ... [and others] ; United States Department of Agriculture ; in cooperation with the Michigan Agricultural Experiment Station and the Michigan Department of Conservation
Date
1939
Series
United States Dept. of Agriculture. Bureau of Chemistry and Soils. Soil survey report : series 1934 ; no. 15