- Oregon State University. Extension Service[remove]3,354
- Pacific Northwest Cooperative Extension137
- United States. Department Of Agriculture127
- Washington State University. Cooperative Extension125
- University Of Idaho. Cooperative Extension Service97
- Oregon State University. Cooperative Extension Service77
- Stebbins, Robert L.63
- Karow, Russell S.51
- Youngberg, Harold Wayne, 1929 50
- Morrow, Alice Mills49
- Mansour, N. S.48
- Fisher, Glenn C.47
- Koester, Ardis W.46
- Mcneilan, Ray A.46
- Southwest Oregon Forestry Intensified Research Program. Adaptive Phase45
- Hannaway, D. B.42
- Washington State University. Extension42
- University Of Idaho. Cooperative Extension System40
- Mcguire, William S.35
- Raab, Carolyn A.35