- Oregon State University. Extension Service[remove]48
- United States. Department Of Agriculture7
- Vough, Lester Ray, 1944 7
- Stebbins, Robert L.5
- Koester, Ardis W.3
- Youngberg, Harold Wayne, 1929 3
- Adams, H. P. (Holyoke Purinton), 1922 2
- Chaplin, Michael Hovey, 1943 2
- Raab, Carolyn A.2
- University Of Idaho. Cooperative Extension Service2
- Washington State University. Extension2
- Ali Niazee, Mohammed Taskeen, 1943 1
- Backham, Robert1
- Baron, Lloyd C.1
- Berglund, Erwin R.1
- Cook, Ronald Lawrence1
- Darr, David R.1
- Decalesta, David S.1
- Eisgruber, Ludwig, M.1
- Farrell, John P.1