- Oregon State University. Agricultural Experiment Station15
- Oregon State University. Extension Service8
- Oregon. Department Of Fish And Wildlife7
- U.S. International Biological Program. Coniferous Forest Biome4
- Gessel, Stanley P.3
- Coppedge, Robert O.2
- Holloway, Milton L.2
- Jackson, T. L. (Thomas Lloyd), 1922 2
- Mcguire, William S.2
- Akobundu, I. O.1
- Akrout, Rached1
- Amujo, Stephen Jimo1
- Anderson, Daniel Craig1
- Ayeni, Timothy Olusegun1
- Bailey, Ronald Owen1
- Barstow, Dennis1
- Baumgartner, Timothy Robert1
- Berger, William Robert1
- Bonacker, Gregg L.1
- Boyce, Kevin Gilbert1