[by Foster Rudolph ... and others] ; United States Department of Agriculture, Soil Conservation Service ; in cooperation with the Tennessee Agricultural Experiment Station and the Tennessee Valley Authority
by E.H. Hubbard ... [and others] ; United States Department of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering
[by B.L. Matzek ... and others] ; United States Department of Agriculture, Soil Conservation Service, in cooperation with the Tennessee Agricultural Experiment Station and the Tennessee Valley Authority
[by Robert Wildermuth ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with the Tennessee Agricultural Experiment Station and the Tennessee Valley Authority
by M.E. Swann ... and others ; [United States Department of Agriculture, Bureau of Plant Industry, in cooperation with Tennessee Agricultural Experiment Station and the Tennessee Valley Authority]
by L.J. Strickland ... [and others] ; United States Department of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering