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)

United States Department of Agricultur.

Aldrich, John Merton (1866–1934)

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)