- Oregon State College. Extension Service23
- Oregon State Agricultural College. Agricultural Experiment Station14
- Oregon State College. Agricultural Experiment Station7
- Besse, Ralph S. (Ralph Stephen), 1887 5
- Brandt, P. M. (Philip Martin), 1888 5
- Powers, W. L. (Wilbur Louis), 18875
- Jones, I. R. (Idwal Ralph), 1898 4
- Oregon State College. Federal Cooperative Extension Service3
- Ballard, Frank Llewellyn2
- Haag, J. R. (Joseph Roy), 1896 2
- Hill, D. D. (Donald David), 1894 2
- Jones, J. S. (J. Shirley), 1876 2
- Klamath County (Or.)2
- Pacific Northwest Forest Experiment Station (Portland, Or.)2
- Ruzek, C. V. (Charles Vladis), 1887 19682
- Selby, H. E. (Halbert Edgerton), 1896 2
- Stephenson, R. E. (Roscoe Elmo), 1885 2
- Ahi, Sadegh Madjidi1
- Appleton, John B. (John Bargate)1
- Automobile Club Of Oregon1