Published in Program aid (United States. Department of Agriculture) ; no. 578 (1963)

by Strahorn, Arthur Thomas, Watson, E. B
Year of Publication 1914

by Bushnell, T. M. (Thomas Mark), Barrett, Wendell
Year of Publication 1918

by Smith, William G, Nesom, George H, Roth, E. G
Year of Publication 1918

by Clark, George Archilbald, Duffield, William Ward, Jordan, David Starr, Lucas, Frederic A. (Frederic Augustus), Moser, Jefferson F, Murray, Joseph, Stejneger, Leonhard Hess, Townsend, Charles Haskins
Year of Publication 1899

by Eckmann, E. C, Baldwin, Mark, Carpenter, E. J
Year of Publication 1920

by Lapham, Macy H. (Macy Harvey), Neill, N. P
Year of Publication 1904

Year of Publication 2007

by Perold, Abraham Izaak
Year of Publication 1913

Year of Publication 1991

by Smith, Richard A
Published in Geological Survey professional paper (USA) (1982)

by Isgrig, Dan, Strobel, Adolph
Year of Publication 1974

by Burns, Denver P
Year of Publication 1971

by Rzhanit︠s︡yn, N. A. (Nikolaĭ Aleksandrovich)
Year of Publication 1964

Year of Publication 1963

Year of Publication 1955

Year of Publication 1954

by Chapman, Esther F
Year of Publication 1954

Year of Publication 1993

by Dubester, Henry J. (Henry Joachim)
Year of Publication 1948