William Parker Headden

Colorado Agricultural Experiment Station, Per Axel Rydberg, William Parker Headden, William Levi Carlyle, Philo Kneeland Blinn, Burton Orange Longyear, Wendell Paddock, Walter Herbert Olin, Christopher James Griffith, A. J. Meyer

C. J. Griffith, Orville Blaine Whipple, William Parker Headden, William Levi Carlyle, Philo Kneeland Blinn, Burton Orange Longyear, Wendell Paddock, Walter Herbert Olin

Emil Peter Sandsten, Clifford Leon Corkins, William Parker Headden, Isaac Ernest Newsom, George Henry Glover, E. Monroe Lowry, John William Sjogren, Otto Vincent Adams, William L. May

Charles Frederick Clark, Julian Gilbert Leach, Edward Jackson Maynard, Ralph Leroy Parshall, William Parker Headden, Arne Kristopher Peitersen, George E. Egginton, Isaac Ernest Newsom, Carl Rowher, Raymond Terry Burdick, William Hough Feldman

William Parker Headden, Louis George Carpenter, Philo Kneeland Blinn, Burton Orange Longyear, F. C. Alford, Wendell Paddock, Robert E. Trimble

Orville Blaine Whipple, George Edwin Morton, William Parker Headden, William Levi Carlyle, George Percival Weldon, H. M. Bainer, H. M. Cottrell, Louis George Carpenter, Philo Kneeland Blinn, Herbert B. Bonebright

Wells Woodbridge Cooke, Charles Spencer Crandall, Clarence Preston Gillette, William Parker Headden