- Oregon Agricultural Experiment Station14
- United States. Division Of Forestry7
- Shaw, G. W. (George Wright), 1864 5
- Oregon Agricultural College. Experiment Station4
- United States. Department Of Agriculture. Forestry Division4
- Fernow, B. E. (Bernhard Eduard), 1851 19233
- Craig, Moses2
- Fernow, B. E. (Bernhard Eduard), 1851 19232
- French, H. T. (Hiram Taylor), 1862 2
- Oregon State University. Agricultural Experiment Station2
- Tratman, E. E. R. (Edward Ernest Russell), 1863 2
- Washburn, F. L. (Frederic Leonard), 1860 19272
- Abbe, Cleveland, 1838 19161
- Coote, George, 1842 19081
- Cordley, A. B. (Arthur Burton), 1864 19361
- Curtis, George E. (George Edward)1
- Fairchild, David, 1869 19541
- Glazier, Willard W., 1841 19051
- Graves, Henry Solon, 1871 19511
- Harrington, Mark Walrod, 1848 19261