- Oregon State University. Extension Service894
- Oregon State University. Cooperative Extension Service70
- Pscheidt, Jay W.60
- Pacific Northwest Cooperative Extension52
- Hart, John M. (John Mervyn), 1947 40
- United States. Department Of Agriculture38
- Washington State University. Cooperative Extension37
- University Of Idaho. Cooperative Extension Service32
- Peachey, Ed29
- Washington State University. Extension28
- Walton, Vaughn M.27
- Peachey, Ronald Edward24
- University Of Idaho. Extension21
- Castagnoli, S.18
- Sullivan, Dan M. (Dan Matthew), 1954 17
- Wiman, Nik G.16
- Fisher, Glenn C.15
- Gamroth, Michael J.14
- Gardner, Ernest Hugh14
- Olsen, Jeff L.14