Reginald D. Forbes, Alvah Peterson, Arthur Truman Semple, Charles Dwight Marsh, Clarence Luther Forsling, Donald Bruce, Edmund Cecil Shorey, Franklin Post Metcalf, Hugh Curtis McPhee, Irvin Carl Feustel, Joshua John Skinner, Josiah Chase Folsom, Karl S. Quisenberry, Lyle Thomas Alexander, Marinus Westveld, R. W. Leukel, Richard Edwin McArdle, Stuart Bevier Show, Theo. H. Scheffer, Thomas Roy Truax, Walter Carter, Wilbur Clifford Edmundson, William Henry Black, A. B. Clawson, E. I. Kotok, Edwin Alfonso Trowbridge, H. E. Dvorachek, Horace Greeley Byers, K. D. Jacob, K. F. Warner, Lester Henry Reineke, O. N. Eaton, Charles Vinyard Wilson · 1931
Manley Alexander Raymond Kelley, Bess Viemont Morrison, Carol Willis Moffett, Edmund Cecil Shorey, F. E. Staebner, Furman Lloyd Mulford, G. R. Hoerner, Glenn Kenton Rule, Harry Waltner Titus, Harvey Leroy Westover, Joel G. Winkjer, John Holmes Martin, John Robert Parker, Karl S. Quisenberry, Kenneth Welton, Margaret Smith, Richmond Young Bailey, Wilbur Clifford Edmundson, William Randolph Walton, William Renwick Beattie, Clyde Monroe Packard, Frank Rabak, Freeman Weiss, J. C. Stephens, John Walter Taylor, Ralph Wagner Netterstrom, W. H. Hosterman · 1941