by Arthur E. Taylor ... [and others] ; United States Department of Agriculture, Bureau of Plant Industry in cooperation with the University of Georgia, College of Agriculture
United States Department of Agriculture, Soil Conservation Service ; in cooperation with the University of Florida, Institute of Food and Agricultural Sciences, Agricultural Experiment Stations, and Soil Science Department; and the Florida Department of Agriculture and Consumer Services
United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with the University of Alaska Fairbanks, Agricultural and Forestry Experiment Station; State of Alaska Department of Natural Resources; and the Alaska Soil and Water Conservation District
[by C.S. Coleman ... and others ; Correlation by G.H. Robinson] ; United States Department of Agriculture, Soil Conservation Service in cooperation with Virginia Agricultural Experiment Station