- Oregon State College. Federal Cooperative Extension Service721
- Oregon State Agricultural College. Extension Service210
- Oregon Agricultural College. Extension Service199
- Oregon State College. Extension Service111
- Bouquet, A. G. B. (Arthur George Bristow), 1885 93
- Oregon State College. Federal Cooperative Extension Service85
- Cowgill, Helen Julia51
- Jackman, E. R. (Edwin Russell), 1894 48
- Jenkins, Lawrence39
- Breithaupt, L. R. (Le Roy), 1886 30
- Mcwhorter, O. T.24
- Dryden, James, 1863 21
- Oregon Agricultural College. Extension Division21
- Bennion, N. L. (Noel Lindsay), 1903 20
- Warren, Rex20
- Huber, M. G.19
- Clark, R. Ralph18
- Thomas, M. D.18
- Cosby, H. E. (Hubert Elmer), 1887 16
- Ross, Charles R. (Charles Robert), 1908 16