- Oregon State University. Extension Service6
- United States. Forest Service. Northern Region6
- Beers, Elizabeth H.3
- Bousfield, Wayne E.3
- Fouche, C.3
- Oregon State College. Agricultural Experiment Station3
- Tanigoshi, Lynell K.3
- United States. Forest Health Protection3
- United States. Forest Service. Northern Region. State & Private Forestry3
- Villalpando, B.3
- Wright, Larry C.3
- Alston, Diane G.2
- Ambrosino, Mario D.2
- Bai, Barry B.2
- Bergen, J. R.2
- Brunmeier, D. A.2
- Cain, Alyssa B.2
- Dreves, Amy J.2
- Fouche, C. F.2
- Gadino, Angela Noelle2