- Oregon State Agricultural College. Extension Service10
- Oregon State College. Federal Cooperative Extension Service9
- Oregon State University. Agricultural Experiment Station8
- Dryden, James, 1863 7
- Oregon Agricultural College. Extension Service6
- Cosby, H. E. (Hubert Elmer), 1887 5
- Lunn, A. G. (Alfred Gunn), 1883 5
- Arscott, G. H. (George Henry), 1923 4
- Arscott, George H.4
- Harper, James A.4
- Nakaue, Harry S.4
- Gilmore, W. J.3
- Oregon Agricultural College. Department Of College Extension3
- Oregon State College. Agricultural Experiment Station3
- Walker, Clyde3
- Bennion, N. L. (Noel Lindsay), 1903 2
- Coyle, B. W.2
- Fischer, Charles Merel2
- Fox, F. E. (Frank Elmer), 1889 2
- Goeger, M. P.2