- Oregon State University. Agricultural Experiment Station20
- Oregon. Dept. Of Geology And Mineral Industries15
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club15
- Oregon State University. Extension Service11
- Twohy, Cynthia11
- Oregon. State Game Commission10
- Oregon State University. College Of Forestry9
- Lane County Pioneer Historical Society (Or.)8
- Lane County Historical Society (Or.)7
- Oregon State University. Forest Research Laboratory7
- Aliaga, L.6
- Altinok, O.6
- Bellantoni, L.6
- Betancourt, M.6
- Bodek, A.6
- Bravar, A.6
- Budd, H.6
- Carneiro, M. F.6
- Chvojka, J.6
- Diaz, G. A.6