- Miller, P. W. (Paul William), 1901 21
- Oregon State College. Federal Cooperative Extension Service7
- Oregon State College. Agricultural Experiment Station6
- Macswan, Iain C.5
- Schuster, C. E. (Carl Ephraim), 1889 5
- Oregon State University. Cooperative Extension Service3
- Thompson, B. G. (Benjamin Garrison), 1891 3
- Bluhm, Wilbur L.2
- Oregon State Agricultural College. Extension Service2
- Painter, John Howe2
- Bollen, Walter Beno, 1896 1
- Every, R. W.1
- Oregon State University. Extension Service1
- Rawlings, Cecil O.1
- Simmons, J. E. (Joseph E.), 1891 1
- Stephenson, R. E. (Roscoe Elmo), 1885 1