Author
Dale, T. Nelson 1845-1937
2
Dale, T. Nelson 1845-1937,
2
Geological Survey (U.S.),
2
Darton, Nelson Horatio, 1865-1948
1
Eldridge, George Homans, 1854-1905
1
Emerson, Benjamin Kendall, 1843-1932
1
Gannett, Samuel S. 1861-1939
1
Geological Survey (U.S.)
1
Marshall, R. B. 1867-1949
1
Martin, G. C. 1875-1943
1
Ransome, F. L. 1868-1935
1
Schaller, Waldemar T. 1882-1967
1
Sullivan, Eugene C. 1872-
1