- United States. Division Of Forestry23
- United States. Forest Service12
- Fernow, B. E. (Bernhard Eduard), 1851 19238
- United States. Department Of Agriculture. Forestry Division8
- Roth, Filibert, 1858 19254
- Graves, Henry Solon, 1871 19513
- Leiberg, John B. (John Bernhard), 1853 19133
- Tratman, E. E. R. (Edward Ernest Russell), 1863 3
- United States. Bureau Of Land Management3
- Geological Survey (U.S.)2
- Mohr, Charles (Charles Theodore), 1824 19012
- Pinchot, Gifford, 1865 19462
- Rixon, Theodore F.2
- Sudworth, George Bishop, 1862 19272
- Abbe, Cleveland, 1838 19161
- Ashe, W. W. (William Willard), 1872 19321
- Ayres, H. B. (Horace Beemer), B. 18561
- Bergoffen, William W.1
- Boas, Franz, 1858 19421
- Bruce, Eugene S. (Eugene Sewell), 1869 19201