Author
Geological Survey (U.S.),
3
Brown, Andrew, 1896-
2
Geological Survey (U.S.)
2
Kepferle, Roy Clark, 1926-
2
Ashley, Harrison Everett, 1876-1910
1
Bryson, Robert P., 1911-
1
Calkins, Frank C., 1878-1974
1
Calvert, William R.
1
Capps, Stephen R. 1881-1949
1
Chamberlin, Rollin T. 1881-1948
1
Darton, Nelson Horatio, 1865-1948
1
Lee, Willis T. 1864-1926
1
White, David, 1862-1935
1
Wright, Charles L.
1