- United States. Division Of Forestry4
- Hopkins, A. D. (Andrew Delmar), 1857 19482
- Pinchot, Gifford, 1865 19462
- Bruce, Eugene S. (Eugene Sewell), 1869 19201
- Fernow, Bernhard Eduard1
- Hosmer, Ralph S. (Ralph Sheldon), 1874 19631
- Leiberg, John B. (John Bernhard), 1853 19131
- Mohr, Charles (Charles Theodore), 1824 19011
- Newell, Frederick Haynes, 1862 19321
- Oregon Agricultural College. Experiment Station1
- Sudworth, George Bishop, 1862 19271
- United States. Department Of Agriculture1
- United States. Division Of Entomology1
- United States. Forest Service1