- Oregon State University. Extension Service[remove]3,832
- Pacific Northwest Cooperative Extension176
- United States. Department Of Agriculture136
- Washington State University. Cooperative Extension126
- Washington State University. Extension102
- University Of Idaho. Cooperative Extension Service99
- University Of Idaho. Extension89
- Pscheidt, Jay W.86
- Oregon State University. Cooperative Extension Service77
- Stebbins, Robert L.62
- Karow, Russell S.56
- Fisher, Glenn C.54
- Hart, John M. (John Mervyn), 1947 50
- Olsen, Jeff L.50
- Youngberg, Harold Wayne, 1929 50
- Morrow, Alice Mills49
- Mansour, N. S.47
- Peachey, Ronald Edward47
- Koester, Ardis W.45
- Southwest Oregon Forestry Intensified Research Program. Adaptive Phase45