- Pacific Northwest Cooperative Extension[remove]192
- Oregon State University. Extension Service157
- Washington State University. Extension80
- United States. Department Of Agriculture79
- University Of Idaho. Extension78
- Washington State University. Cooperative Extension66
- University Of Idaho. Cooperative Extension Service48
- University Of Idaho. Cooperative Extension System24
- Washington State University. Cooperative Extension Service17
- Burrill, L. C.16
- Schmall, Vicki L.14
- Oregon State University. Cooperative Extension Service13
- Bowman, Sally R., 1949 8
- Trimmer, Walter L.8
- Hansen, Hugh J.7
- Raab, Carolyn A.7
- Stebbins, Robert L.7
- Burt, Lawrence A.6
- Frasier, Roberta C.6
- Hermes, J. C. (James C.)6