Author
Geological Survey (U.S.),
462
Geological Survey (U.S.)
203
SpringerLink (Online service)
55
Smithsonian Institution. Press
29
Cobban, William A., 1916-2015
27
Imlay, Ralph W. 1908-1989
27
Imlay, Ralph W. 1908-1989,
26
Nickles, John M. 1859-1945
20
Cobban, William A., 1916-2015,
19
Gordon, Mackenzie, 1913-
19
Sando, William Jasper
18
Sando, William Jasper,
18
Yochelson, Ellis L. 1928-2006,
18
Girty, George Herbert, 1869-1939
17
Kentucky Geological Survey
16
Ross, Reuben James, 1918-
16
Yochelson, Ellis L. 1928-2006
15
Girty, George Herbert, 1869-1939,
14
Weeks, Fred Boughton, 1864-1942
14
Infobase,
13
ScienceDirect (Online service)
13
Addicott, Warren O.
12
Addicott, Warren O.,
12
Bergquist, Harlan R. 1908-
12
Douglass, Raymond C.
12
Sohn, I. G. 1911-2000
12
MacNeil, F. Stearns 1909-
11
Gannett, Henry, 1846-1914
10
Jones, David Lawrence, 1930-
10
Pojeta, John, Jr
10
Sohn, I. G. 1911-2000,
10
Cushman, Joseph A. 1881-1949,
9
Elder, William P.
9
Palmer, Allison R.
9
Sohl, Norman F. 1924-1993
9
United States. Office of Naval Petroleum and Oil Shale Reserves
9
Woodring, W. P. 1891-1983
9
Woodring, W. P. 1891-1983,
9
Armstrong, Augustus K.
8
Boucot, A. J. 1924-
8
Moore, Ellen James
8
Palmer, Allison R.,
8
Reeside, John B., Jr., 1889-1958,
8
Repenning, Charles Albert, 1922-
8
SpringerLink (Online Service)
8
Stephenson, Lloyd William, 1876-1962,
8
Andrews, George William, 1929-
7
Churkin, Michael, 1932-
7
Darton, Nelson Horatio, 1865-1948
7
Gardner, Julia Anna, 1882-1960,
7
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