- United States. Forest Service. Pacific Northwest Region. Thirty Year Club20
- Lane County Historical Society (Or.)19
- Oregon State University. Agricultural Experiment Station8
- United States. Forest Service8
- Oregon Agricultural College7
- Lane County Pioneer Historical Society (Or.)6
- Oregon State University6
- United States. Agricultural Research Service5
- Gilmont, Susan4
- Hatch, Melville Harrison, 1898 4
- Markland, Mary4
- Oregon State University. College Of Forestry4
- Oregon State University. Department Of Crop Science4
- Oregon State University. Extension Service4
- Oregon. Fish Commission4
- Pearcy, William G.4
- Webster, Janet G.4
- Young, William C.4
- Carey, Andrew G., jr.3
- Close, David A.3