Birely J. Landis / Harry L. Garver / J. W. Turelle / Kenneth Hayes Myers / L. M. Lucas / Maurice Donald Atkins / Merrill Sylvester Timmins / United States. Agricultural Research Service. Agricultural Engineering Research Division / Walter E. Peay / Warren Whitcomb / William J. Ash / William W. Neely / Jerome A. Onsager / John Wesley Rockey / Lowell Eugene Campbell / Verne Elbert Davison / Wayne W. Austin / H. L. Marks | 