- Oregon State University. Extension Service2,970
- Oregon State University. Cooperative Extension Service352
- Pacific Northwest Cooperative Extension139
- United States. Department Of Agriculture130
- Washington State University. Cooperative Extension128
- University Of Idaho. Cooperative Extension Service109
- Gardner, E. Hugh90
- Koester, Ardis W.80
- Stebbins, Robert L.75
- Mansour, N. S.62
- Jackson, T. L.56
- Morrow, Alice Mills50
- Raab, Carolyn A.49
- Fisher, Glenn C.45
- Oregon State College. Federal Cooperative Extension Service44
- Hannaway, D. B.40
- University Of Idaho. Cooperative Extension System40
- Washington State University. Extension40
- Sawer, Barbara J.37
- Gardner, Ernest Hugh36