- Forest Products Laboratory (U.S.)6
- Oregon State University. Extension Service4
- Bonnicksen, Leroy W., 1923 2
- Browne, F. L. (Frederick Lincoln), 1895 2
- Doyle, D. V.2
- Johnson, Dexter W.2
- Moore, James A.2
- Oregon State College. Agricultural Experiment Station2
- Pacific Northwest Cooperative Extension2
- United States. Department Of Agriculture2
- University Of Idaho. Cooperative Extension Service2
- Washington State University. Cooperative Extension2
- Benson, Donald Dunbar1
- Brouse, Don1
- Campbell, John Carl1
- Hansen, Hugh J.1
- Hebert, James Michael1
- Hellickson, Martin L.1
- Judge, Barbara C.1
- Liik, George1