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
[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
[by Russell R. Sanders ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with Texas Agricultural Experiment Station
[by Ralph C. Cole ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with the University of California Agricultural Experiment Station
[by R.A. Gardner ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with the California Agricultural Experiment Station