- Oregon State University. Extension Service19
- United States. Department Of Agriculture11
- Pacific Northwest Cooperative Extension8
- Washington State University. Cooperative Extension8
- University Of Idaho. Cooperative Extension Service7
- Washington State University. Extension5
- University Of Idaho. Extension4
- William, R. D.4
- Sander, Gary H.3
- University Of Idaho. Cooperative Extension System3
- Burrill, L. C.2
- Colquhoun, Jed2
- Douglass, Bernard S.2
- Landgren, Chal G.2
- Peachey, Ronald Edward2
- Proebsting, William M.2
- Ahrens, Glenn R.1
- Al Khatib, Kassim1
- Ball, Daniel A. (Daniel Allen), 1954 1
- Bedell, Thomas E.1