- Oregon State University. Extension Service[remove]3,101
- Washington State University. Cooperative Extension124
- United States. Department Of Agriculture120
- Pacific Northwest Cooperative Extension117
- University Of Idaho. Cooperative Extension Service95
- Oregon State University. Cooperative Extension Service77
- Stebbins, Robert L.62
- Karow, Russell S.51
- Youngberg, Harold Wayne, 1929 50
- Morrow, Alice Mills49
- Mansour, N. S.46
- Fisher, Glenn C.45
- Koester, Ardis W.45
- Southwest Oregon Forestry Intensified Research Program. Adaptive Phase45
- Hannaway, D. B.42
- University Of Idaho. Cooperative Extension System40
- Washington State University. Extension40
- Mcguire, William S.35
- Bedell, Thomas E.33
- University Of Idaho. Extension33