- James, Robert L.54
- United States. Forest Service. Northern Region35
- Oregon State University. Extension Service34
- Pease, James R. (James Robert)22
- Oregon State University. Agricultural Experiment Station12
- Collins, Melvin D.11
- Haas, James B.11
- Oregon. Fish Commission. Research Division11
- Sams, Roy E.11
- Thompson, Robert N.11
- Willis, Raymond A.11
- Gilligan, Carma J.10
- United States. Forest Health Protection10
- United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management10
- Jaiswal, Pankaj9
- Collier, Robert W.7
- Mcmanus, James7
- United States. Forest Service. Northern Region. State & Private Forestry7
- Dymond, Jack6
- Fonseca, Nuno A.6