- Oregon Agricultural College. Experiment Station154
- Oregon Agricultural Experiment Station76
- Potter, E. L. (Ermine Lawrence), 1884 19
- Oregon State Agricultural College. Agricultural Experiment Station18
- Powers, W. L. (Wilbur Louis), 188716
- Oregon Agricultural College. Extension Service13
- Oregon State Agricultural College13
- Shaw, G. W. (George Wright), 1864 13
- Lewis, C. I. (Claude Isaac), 1880 192412
- Oregon State Agricultural College. Experiment Station12
- United States. Division Of Forestry11
- Chapman, John W.10
- Coote, George, 1842 190810
- Demchenko, Natalia L.10
- Oregon Agricultural College10
- United States. Forest Service10
- Durkina, Valentina B9
- Fadeev, Valeriy I.9
- French, H. T. (Hiram Taylor), 1862 9
- Hartman, Henry, 1889 9