- Oregon State Agricultural College. Agricultural Experiment Station112
- Forest Products Laboratory (U.S.)78
- Oregon State College. Agricultural Experiment Station50
- Oregon State Agricultural College. Extension Service44
- Pacific Northwest Forest Experiment Station (Portland, Or.)30
- Oregon State College. Extension Service21
- Oregon State College. Federal Cooperative Extension Service21
- Powers, W. L. (Wilbur Louis), 188711
- Browne, F. L. (Frederick Lincoln), 1895 10
- Brandt, P. M. (Philip Martin), 1888 9
- Buell, Edward D.9
- Jones, I. R. (Idwal Ralph), 1898 9
- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)9
- Price, F. E. (Frederick Earl), 1898 9
- Selby, H. E. (Halbert Edgerton), 1896 8
- Mote, Don C. (Don Carlos), 1887 7
- Potter, E. L. (Ermine Lawrence), 1884 7
- Robinson, R. H. (Reginald Heber), 1886 7
- Wiegand, Ernest Herman, 1886 7
- Wilster, G. H. (Gustav Hans), 18937