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
by P.R. McMiller ... [and others] ; United States Department of Agriculture, Bureau of Plant Industry ; in cooperation with the University of Minnesota Agricultural Experiment Station
by A.C. Anderson ... [and others] ; United States Department of Agriculture, Bureau of Plant Industry 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
by W. H. Buckhannan, in charge ... [and others] ; United States Department of Agriculture in cooperation with the Oklahoma Agricultural Experiment Station
by Clarence Lounsbury ... [and others] ; United States Department of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering, in cooperation with the Alabama Department of Agriculture and Industries
by H.P. Ulrich ... [and others] ; [United States Department of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering in cooperation with the Purdue University Agricultural Experiment Station]