- Oregon Agricultural College. Experiment Station208
- Oregon Agricultural College. Extension Service135
- Forest Products Laboratory (U.S.)87
- Oregon Agricultural Experiment Station83
- Oregon State Agricultural College. Extension Service81
- Lewis, C. I. (Claude Isaac), 1880 192423
- Oregon State College. Extension Service23
- Potter, E. L. (Ermine Lawrence), 1884 23
- United States. Division Of Forestry23
- Oregon Agricultural College. Extension Division21
- United States. Forest Service21
- Dryden, James, 1863 20
- Hyslop, G. R. (George Robert), 1884 20
- Oregon State Agricultural College. Agricultural Experiment Station20
- Powers, W. L. (Wilbur Louis), 188719
- Bouquet, A. G. B. (Arthur George Bristow), 1885 17
- Lovett, A. L. (Arthur Lester), 1885 192416
- Shaw, G. W. (George Wright), 1864 16
- French, H. T. (Hiram Taylor), 1862 14
- Robinson, R. H. (Reginald Heber), 1886 14