- Long, David D.19
- Fuller, G. L. (Glenn Loren), 1891-7
- United States. Bureau of Soils4
- Maxon, E. T. (Earl Terry), b. 18893
- Moon, John W. (Joseph Worley), 1891-3
- Mooney, Charles N.3
- Sweet, A. T. (Arthur T.), 1869-19163
- Taylor, Arthur E. (Arthur Elijah), b. 18773
- Baldwin, Mark, 1889-2
- Bennett, Hugh H. (Hugh Hammond), 1881-19602
- Britton, J. C.2
- Meyer, A. H. (Alfred Henry), 1888-19342
- Miller, J. T. (John T.), 1906-2
- Miller, John T.2
- Phillips, S. W. (Samuel William), 1894-19332
- Phillips, S. W. (Samuel Williams), 1894-19332
- Winston, R. A. (Robert Alonzo), b. 18782
- Allen, Risden T.1
- Beesley, Thomas E. (Thomas Edward), 1908-1
- Burke, R. T. Avon (Richard Thomas Avon), b. 18781
