- United States. Forest Service7
- Oregon Agricultural College4
- Indian War Veterans And Historical Society3
- Nash, Wallis3
- Native Sons Of Oregon3
- Oregon Agricultural College. Extension Service3
- Oregon Agricultural Experiment Station3
- Oregon Pioneer Association3
- Oregon State College. Extension Service3
- Southern Pacific Company3
- United States. Department Of Agriculture. Forestry Division3
- Fernow, B. E. (Bernhard Eduard), 1851 19232
- Forest Products Laboratory (U.S.)2
- Minto, John, 1822 19152
- Potter, E. L. (Ermine Lawrence), 1884 2
- Show, S. B. (Stuart Bevier), 1886 19632
- Sudworth, George Bishop, 1862 19272
- Williams, John Harvey, 1864 2
- Abbe, Cleveland, 1838 19161
- Adams, Kate D.1