- Oregon State University. Extension Service166
- Oregon State College. Agricultural Experiment Station90
- Pscheidt, Jay W.69
- Oregon State University. Agricultural Experiment Station34
- Peachey, Ronald Edward31
- Walton, Vaughn M.29
- Fisher, Glenn C.28
- Peachey, Ed27
- Mote, Don C. (Don Carlos), 1887 26
- Oregon Agricultural College. Experiment Station25
- United States. Forest Service. Northern Region. State & Private Forestry25
- Olsen, Jeff L.23
- United States. Forest Service. Northern Region20
- Wiman, Nik G.18
- Baggett, James R.17
- Zeller, S. M. (Sanford Myron), 1885 194817
- Dreves, Amy J.15
- Mack, H. J.15
- Skinkis, Patricia A.15
- Frazier, W. A.14