- Oregon State University. Cooperative Extension Service[remove]189
- Oregon State University. Extension Service76
- Jackman, E. R.15
- Jackman, E. R. (Edwin Russell), 1894 196715
- Pacific Northwest Cooperative Extension13
- University Of Idaho. Cooperative Extension Service12
- Washington State University. Cooperative Extension Service12
- Frasier, Roberta C.8
- Cornett, Elgin7
- Ross, Jackson7
- Strawn, Bernice5
- Brown, Dorothy F. (Dorothy Furtick)4
- Every, R. W.4
- Hedrick, D. W.4
- Macswan, Iain C.4
- Markgraf, Peter M.4
- Bunch, Thomas R.3
- Carlson, Elaine K.3
- Miller, P. W. (Paul William), 1901 3
- Thomas, M. D.3