- Carlos G. Bates, William Buckhout Greeley, Alfred R. Lee, Benjamin Yoe Morrison, Charles Wesley Hauck, D. F. Fisher, Edwin LeFevre, George McMillan Darrow, Harvey W. Hawthorne, Hubert Bunyea, J. M. Westgate, James Herbert Beattie, James Robert Dawson, John Oscar Williams, Leland Ossian Howard, Morley Allan Jull, Neale F. Howard, Paul Albert Ewing, Samuel Hawkens Ray, William Daniel Smith, William Henry Black, Henry James Franklin, Charles Brooks, Earl Beach Krantz, Earl W. McComas, Lynn Shelby Robertson, O. G. Malde
· 1928
- Albert Ronald Merz, Auton William Skuderna, B. L. Wade, Bess Viemont Morrison, Chalmers Jackson King, Charles Frederick Clark, Charles W. Culpepper, Clark Frederick Clark, David A. Savage, Elmer Valentine Walter, Ernest Muchmore Mervine, Fred Corry Bishopp, George Washington Craddock, Helen Nebeker Hann, Joseph Stuart Caldwell, Joshua John Skinner, Leo Anthony Isaac, Loyd William Brannon, Oscar Roland Mathews, Paul A. Berry, Rufus King Helphenstine, Samuel Newton Dicken, United States. Department of Agriculture, Victor Rickman Boswell, Wilbur Clifford Edmundson, William Daniel Smith, Hazel Katherine Stiebeling, Arthur Otto Alben, Carroll Newton Smith, Frederick James Stevenson, Hubert Hill Moon, James Herbert Beattie, Lee Seaton, Lindsey Andrew Brown, Margaret Blanche Hays, Ralph Edwin Beckett, Stanley Ward McBirney, Adonis A. Mathewson, Earl Donald Fowler, John McDowell McCown, Orlan Parker
· 1939
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No image available
No image available