Buchanan, L. L.
Banta, Arthur M. (1877–1946)
Marsh, Charles Dwight (1855–1932) Clawson, Arthur Brooks (1878–1937) Marsh, Hadleigh (1888-?)
Schaus, William (1858–1942)
Ridgway, Robert (1850–1929)
Chittenden, Frank Hurlbut (1885–1929)
Juday, Chancey (1871–1944)
Forest Service and Extension Service [U.S.A.]
Marsh, Charles Dwight (1855–1932) Clawson, Arthur Brooks (1878–1937) Eggleston, Willard Webster (1863–1935)
Aldrich, John Merton (1866–1934)
Aldrich, John Merton (1866–1934)
Linell, Martin L. (1849–1897)
Blaisdell, Frank Ellsworth (1862–1946)
Kearfott, William Dunham (1864–1917)