- Oregon Agricultural Experiment Station24
- Oregon Agricultural College. Experiment Station14
- Hopkins, A. D. (Andrew Delmar), 1857 19488
- United States. Division Of Forestry8
- Withycombe, James, 1854 7
- Lewis, C. I. (Claude Isaac), 1880 19246
- Knisely, A. L. (Abraham Lincoln), 1865 5
- United States. Forest Service5
- Oregon State Agricultural College4
- Oregon State Agricultural College. Experiment Station4
- United States. Division Of Entomology4
- Graf, Samuel Herman, 1887 3
- Indian War Veterans And Historical Society3
- Kent, F. L. (Fred Leroy), 1868 3
- Lake, E. R. (Edward Ralph), B. 18603
- Native Sons Of Oregon3
- Oregon Pioneer Association3
- Pernot, E. F. (Emile Francis), 18593
- United States. Bureau Of Entomology3
- Christiansen, Conrad2