by James Austin

1911

by James H. Patric, Peter E. Black

1968

by C. William Hesseltine, Alvin Charles Egbert, Bratislav Zak, Chester Ray Thompson, D. M. Doty, Frank G. Hawksworth, H. O. Hetzer, H. P. Binger, Herbert George Ewan, Hubert W. Prescott, John James Willaman, Lake S. Gill, Leander D. Howell, N. D. Bayley, Ralph Arthur Loomis, Ross Calvin Thompson, Walter Whittier Swett, William Harold Waldorf, William M. Phillips, William Avener Faught, Bernice Schubert, C. A. Matthews, Earl Orel Heady, Edward J. Ryder, Emmanuel Melvin Bickoff, Glen T. Barton, J. B. Parker, John C. Pierce, Max Moore Reeher, Ralph Ernest Comstock, G. O. Kohler, George R. Van Atta, John Henry Zeller, Robert E. McDowell, T. Heidhues, R. D. Plowman, Richard Lee Hiner, J. Guggolz, W. R. Harvey, A. L. Livingstone

1961

by 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