- Oregon State University. Extension Service65
- Oregon State College. Agricultural Experiment Station40
- Stebbins, Robert L.18
- Macswan, Iain C.13
- Oregon Agricultural College. Experiment Station13
- Fisher, Glenn C.12
- Every, R. W.11
- Oregon State University. Agricultural Experiment Station11
- Pscheidt, Jay W.11
- Oregon Agricultural Experiment Station9
- Wiegand, Ernest Herman, 1886 9
- Castagnoli, S.8
- Jones, Sidney Carroll, 1898 19748
- Long, L. E. (Lynn Edwards), 1953 8
- Olsen, Jeff L.8
- Shearer, Peter W.8
- Irish, Arthur E.7
- Oregon State College. Federal Cooperative Extension Service7
- Lewis, C. I. (Claude Isaac), 1880 19246
- Raab, Carolyn A.6