- Forest Products Laboratory (U.S.)209
- Oregon Agricultural College. Experiment Station131
- Oregon Agricultural College. Extension Service67
- Oregon State Agricultural College. Agricultural Experiment Station44
- Oregon State Agricultural College. Extension Service29
- Oregon State College. Agricultural Experiment Station27
- Oregon State College. Extension Service23
- Hyslop, G. R. (George Robert), 1884 18
- Potter, E. L. (Ermine Lawrence), 1884 18
- Hartman, Henry, 1889 16
- Mote, Don C. (Don Carlos), 1887 15
- Powers, W. L. (Wilbur Louis), 188715
- Robinson, R. H. (Reginald Heber), 1886 13
- Lovett, A. L. (Arthur Lester), 1885 192412
- Schuster, C. E. (Carl Ephraim), 1889 11
- United States. Forest Service10
- Barss, H. P. (Howard Phillips), 1885 9
- Withycombe, Robert, 1880 9
- Bullis, D. E. (Deloss Everett), 1894 19847
- Johnson, A. Grace7