- Oregon State University. Extension Service21
- United States. Department Of Agriculture9
- University Of Idaho. Cooperative Extension Service7
- Washington State University. Cooperative Extension7
- Landgren, Chal G.5
- Douglass, Bernard S.4
- Forest Products Laboratory (U.S.)4
- Pacific Northwest Cooperative Extension4
- Ross, Charles R. (Charles Robert), 1908 4
- Sander, Gary H.4
- William, R. D.3
- Deangelis, Jack D.2
- Mcalister, James J.2
- Proebsting, William M.2
- Simko, B. C. (Ben C.)2
- University Of Idaho. Cooperative Extension System2
- Washington State University. Extension2
- Al Khatib, Kassim1
- Bond, William Merrill1
- Bondi, Michael C.1