- Forest Products Laboratory (U.S.)194
- Oregon Agricultural College. Experiment Station131
- Oregon Agricultural College. Extension Service64
- Oregon State Agricultural College. Extension Service24
- Oregon State College. Agricultural Experiment Station24
- Oregon State College. Extension Service23
- Oregon State Agricultural College. Agricultural Experiment Station19
- Potter, E. L. (Ermine Lawrence), 1884 17
- Hyslop, G. R. (George Robert), 1884 15
- Powers, W. L. (Wilbur Louis), 188715
- Mote, Don C. (Don Carlos), 1887 13
- Hartman, Henry, 1889 12
- Lovett, A. L. (Arthur Lester), 1885 192412
- Robinson, R. H. (Reginald Heber), 1886 11
- Barss, H. P. (Howard Phillips), 1885 9
- Schuster, C. E. (Carl Ephraim), 1889 9
- United States. Forest Service9
- Withycombe, Robert, 1880 9
- Johnson, A. Grace7
- Smith, Margery M.7