- D. L. Parker, Ernest John George, Ernest William Laake, George Henry Hepting, George W. Barber, Gustaf Adolph Pearson, Horace Greeley Byers, John Robert Magness, John Robinson Winston, Joseph Everett Alicata, Leander D. Howell, Lorraine Joseph Markwardt, Martin Trantham Young, Newell Emanuel Good, Paul Random Henson, Paul Wormer Edwards, Philip Carman Wakeley, Raymond Secord Washburn, Robert Calloway Gaines, Stephen Harold Hastings, Walter Ernest Fleming, Elliott Sanford Degman, Emory Clayton Cushing, F. E. Parker, George Eugene Marvin, Harvey Leroy Westover, John Sanderlain Burgess, Luther R. Leinbach, Lyle Thomas Alexander, Raymond Eugene Marsh, Thomas Randall Carson Wilson, Henry Edward Parish, Joe Roudolph Furr, R. S. Holmes
· 1927
- H. L. Person, Albert Ronald Merz, Burt Walter Heywang, Charles W. Culpepper, Clarence Elbert Clement, Colin Alexander Taylor, Edward Dougall Gordon, Edwin Richard Kalmbach, Floyd Franklin Smith, Glenn Kenton Rule, H. F. Willard, Harold Hall McKinney, Irving Wesley Dix, Ivan Claude Jagger, James Vernon Morrow, John Clifford Elmore, John Robbins Mohler, Lee Milo Hutchins, Marinus Westveld, Matthew James Culley, May Thacher Cooke, Randall Latta, Robert Claude Wright, Samuel Benton Nuckols, Stuart Bevier Show, United States. Department of Agriculture, Maurice S. Shahan, Arthur Charles Mason, Charles Cloyes Fletcher, Dudley Smith, Eddie Walter Bodine, Gilbert Weaver Scott, Hubert Hill Moon, Joe Roudolph Furr, John Robert Magness, Leonard Gordon Utter, Wilbur Magruder Hurst, Halbert Houston Thornberry
· 1937
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No image available
D. L. Parker, Ernest John George, Ernest William Laake, George Henry Hepting, George W. Barber, Gustaf Adolph Pearson, Horace Greeley Byers, John Robert Magness, John Robinson Winston, Joseph Everett Alicata, Leander D. Howell, Lorraine Joseph Markwardt, Martin Trantham Young, Newell Emanuel Good, Paul Random Henson, Paul Wormer Edwards, Philip Carman Wakeley, R. C. Gaines, Raymond Secord Washburn, Stephen Harold Hastings, Walter Ernest Fleming, Elliott Sanford Degman, Emory Clayton Cushing, F. E. Baker, George Eugene Marvin, Harvey Leroy Westover, John Sanderlain Burgess, Luther R. Leinbach, Lyle Thomas Alexander, Raymond Eugene Marsh, Thomas Randall Carson Wilson, Henry Edward Parish, Joe Roudolph Furr, R. S. Holmes· 1935
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No image available
No image available
Homer Columbus Thompson, Axel Ferdinand Gustafson, Bruce Lee Melvin, Clifford William Gilbert, Cyrus Richard Crosby, Dean Richmond Marble, Earle Irving Wilde, Faith Moors Williams, Gladys M. Kensler, Glenn A. Bakkum, Glenn Washington Herrick, Helen Canon, Howard Wayland Beers, James Adrian Bizzell, James Edward Knott, Laurence Howland MacDaniels, Martin Paul Catherwood, Myron Slade Kendrick, Ray E. Wakeley, Roland Franklin Buckman, Thomas Lyttleton Lyon, Walter Conrad Leopold Muenscher, Walter Van Price, Whiton Powell· 1929