Author
Geological Survey (U.S.),
3
Imlay, Ralph W. 1908-1989,
2
Jones, David Lawrence, 1930-
2
Knowlton, Frank Hall, 1860-1926
2
Chester, Frederick D. 1861-1943
1
Clarke, Frank Wigglesworth, 1847-1931
1
Cleland, Herdman Fitzgerald, 1869-1935
1
Hay, Robert, 1835-1895
1
Imlay, Ralph W. 1908-1989
1
Lindgren, Waldemar, 1860-1939
1
Lupher, R. L. 1904-
1
Melville, William Harlow
1
Nilsen, Tor Helge
1
Nilsen, Tor Helge,
1
Packard, Earl L. 1885-1983
1
Shattuck, George Burbank, 1869-1934
1
Spurr, Josiah Edward, 1870-1950
1
Weeks, Fred Boughton, 1864-1942
1
Williams, George Huntington, 1856-1894
1
Wright, G. Frederick 1838-1921
1