- A. B. Clawson, Arthur Frederick Sievers, C. H. Batchelder, C. J. King, Chase Going Woodhouse, Frederick Charles Scobey, Glenn Sanborn Smith, Hugh Hackland Darby, Irvin Carl Feustel, Irvin Cecil Brown, James Robert Douglass, John Guice Sutton, John William Strowbridge, Leander Scales Stuart, M. A. Crosby, M. S. Anderson, Milo Nelson Wood, Norma Lenys Pearson, Orville Alva Faris, Robert Claude Wright, Samuel Fortier, William Henry Black, Arthur Appleton Young, David Dewitt Questel, Edwin Alfonso Trowbridge, Eleanor Muriel Kapp, Faith Moors Williams, Horace Greeley Byers, Jacob Allen Clark, Morris Samson Lowman, Ralph Wylie Frey, Thomas Donnelly Rice, Walter M. Peacock, Lawrence Henry James, Thomas Moore Whiteman
· 1933
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- A. J. Pieters, Benjamin Gaillard Sitton, Carl Rohwer, Charlotte Chatfield, Clarence Francis Kelly, Furman Lloyd Mulford, George Arceneaux, George Henry Hepting, Ira Myron Hawley, J. I. Hardy, John Wiloughby Randolph, LeRoy Powers, Leon Hugh Kelso, Mark Matthew Regan, Marvin Merritte High, Milo Nelson Wood, Myron Francis Babb, Ralph W. Phillips, Robert Elsmere Hutton, Royce Atwood Wight, Rudolph Knugaard Froker, Thomas Henry Kearney, United States. Department of Agriculture, Andy Walker Colebank, Ellsworth Zouave Russell, Frederick William Metzger, Georgian Adams, Harold William Wolf, Irvin Fay Reed, James Ellsworth Kraus, Richard Thomas Gibbens, Robert Hibbs Peebles, Walker Myrick Dawson, Austin Clair Hoffman, Charles Conrad Krumbhaar, Edward Dougall Gordon, Ernest Gordon Smith
· 1940
No image available
No image available
No image available
Albert Ronald Merz, Andrew Peter Anderson, George Matthew Reed, Harry Taylor Edwards, Howard Ross Tolley, Jacob Allen Clark, Jons August Fries, Josiah Chase Folsom, Milo Nelson Wood, Wayne Mackenzie Stevens, Donald Cameron Cochrane, John Donald Black, John Holmes Martin, Leo Edward Melchers, William Horace Ross, Mordecai Ezekiel, Winfred Waite Braman· 1925