- Oregon Agricultural Experiment Station14
- Shaw, G. W. (George Wright), 1864 6
- United States. Division Of Forestry6
- Fernow, B. E. (Bernhard Eduard), 1851 19233
- United States. Department Of Agriculture. Forestry Division3
- Coote, George, 1842 19082
- Fernow, B. E. (Bernhard Eduard), 1851 19232
- French, H. T. (Hiram Taylor), 1862 2
- Oregon State Agricultural College. Experiment Station2
- Oregon State University. Agricultural Experiment Station2
- Tratman, E. E. R. (Edward Ernest Russell), 1863 2
- Abbe, Cleveland, 1838 19161
- Butterworth, Hezekiah, 1839 19051
- Chittenden, F. H. (Frank Hurlbut), 1851 19231
- Cordley, A. B. (Arthur Burton), 1864 19361
- Craig, Moses1
- Curtis, George E. (George Edward)1
- Ellis, Edward Sylvester, 1840 19161
- Fairchild, David, 1869 19541
- Gilbert, William S.1