Author
Gannett, Henry, 1846-1914
3
Dale, T. Nelson 1845-1937
2
Knopf, Adolph, 1882-1966
2
Adams, George I. 1870-1932
1
Arnold, Ralph, 1875-1961
1
Banning, Lloyd H. 1909-2002
1
Brooks, Alfred H. 1871-1924
1
Clarke, Frank Wigglesworth, 1847-1931
1
Darton, Nelson Horatio, 1865-1948
1
Diller, J. S. 1850-1928
1
Fisher, Cassius A. 1872-1930
1
Gannett, Samuel S. 1861-1939
1
Geological Survey (U.S.)
1
Goode, Richard Urquhart, 1858-1903
1
Grant, U. S. 1867-1932
1
Hess, Frank Lee, 1871-1955
1
Holmes, Wesley T.
1
Imlay, Ralph W. 1908-1989
1
Marshall, R. B. 1867-1949
1
Martin, G. C. 1875-1943
1
Pirsson, Louis V. 1860-1919
1
Prindle, L. M. 1865-1956
1
Schaller, Waldemar T. 1882-1967
1
Smith, George Otis, 1871-1944
1
Stanton, T. W. 1860-1953
1
Stone, Ralph W. 1876-1964
1
United States. Bureau of Mines
1
Weeks, Fred Boughton, 1864-1942
1
White, David, 1862-1935
1
Wright, Chester W. 1879-1966
1