- Southern Pacific Company5
- United States. Forest Service5
- Williams, John Harvey, 1864 3
- Conover, Charles Tallmadge, 1862 19612
- Graves, Henry Solon, 1871 19512
- Muir, John, 1838 19142
- Oregon Agricultural College2
- United States Geographic Board2
- [Author Not Identified]1
- Allen, Edward Tyson1
- Bade, William Frederic, 1871 19361
- Barnett, James Duff, 1870 19571
- Benton County Growers' Association1
- Burke, Thomas C.1
- Canada. Commission Of Conservation1
- Cannon, Miles, 1862 19381
- Carney, Mabel, 1885 1
- Class Of 19121
- Connor, William Durward, 1874 1
- Corvallis Commercial Club (Or.)1