Author
Arnold, Bertha P.,
1
Darton, Nelson Horatio, 1865-1948
1
Davidson, David F. 1923-
1
Diller, J. S. 1850-1928
1
Geological Survey (U.S.),
1
Harris, Robert A.
1
Harris, Robert A.,
1
Hill, Robert Thomas, 1858-1941
1
Penrose, R. A. F.
1
Smith, Eugene Allen, 1841-1927
1
Upham, Warren, 1850-1934
1
Williams, Henry Shaler, 1847-1918
1
Willis, Bailey, 1857-1949
1