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- United States. Division Of Forestry9
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- Shaw, G. W. (George Wright), 1864 4
- United States. Department Of Agriculture. Forestry Division4
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- Hedrick, U. P.3
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- Fernow, B. E. (Bernhard Eduard), 1851 19232
- Oregon State University. Agricultural Experiment Station2
- Tratman, E. E. R. (Edward Ernest Russell), 1863 2
- United States. Congress. Senate. Committee On Commerce2
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- Butterworth, Hezekiah, 1839 19051
- Chittenden, F. H. (Frank Hurlbut), 1851 19231
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- Cordley, A. B. (Arthur Burton), 1864 19361
- Coville, Frederick V. (Frederick Vernon), 1867 19371
- Curtis, George E. (George Edward)1