Creator
- Macpherson, Hector9
- Nelson, Milton N.9
- Oregon State College. Federal Cooperative Extension Service9
- Bouquet, A. G. B. (Arthur George Bristow), 1885 7
- Oregon State College. Agricultural Experiment Station3
- Forest Products Laboratory (U.S.)2
- Powers, W. L. (Wilbur Louis), 18872
- Brandt, P. M. (Philip Martin), 1888 1
- Bruere, Martha Bensley, 1879 19531
- Chidester, G. H.1
- Jones, I. R.1
- Mcgovern, John Neilson, 1908 1
- United States. Forest Service1
- Wilster, G. H. (Gustav Hans), 18931