herausgegeben im Auftrage der Deutschen Forschungsgemeinschaft von K. Kayser ... [and others] ; Kartographie, Schaffmann & Kluge Landkartenverlag, Berlin
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