Author
Geological Survey (U.S.)
8 results
Stose, George Willis, 1869-1960
7 results
Pennsylvania. Bureau of Topographic and Geologic Survey
5 results
Bascom, F. (Florence), 1862-1945
4 results
Butts, Charles, 1863-1946
4 results
Pennsylvania. Department of Environmental Resources
4 results
Hainly, Robert A.
3 results
Reed, Lloyd A.
3 results
Balsley, J. R.
2 results
Bayley, William Shirley, 1861-1943
2 results
Clapp, Frederick G. (Frederick Gardner), 1879-1944
2 results
Hawkes, H. E. (Herbert Edwin), 1912-1996
2 results
Hoffman, John N.
2 results
Hotz, Preston Enslow, 1913-
2 results
Jonas, Anna I. (Anna Isabel), 1881-1974
2 results
Martin, Lawrence, 1880-1955
2 results
Moore, Elwood S., 1878-
2 results
Patterson, E. D. (Elmer Davisson)
2 results
Phalen, W. C. (William Clifton), 1877-1949
2 results
Richardson, G. B. (George Burr), 1872-1949
2 results
Smithsonian Institution
2 results
Stone, Ralph W. (Ralph Walter), 1876-1964
2 results
Van Lieu, J. A.
2 results
Wagner, Holly C. (Holly Clyde), 1918-2005
2 results
Way, John H.
2 results
Wedow, Helmuth, 1917-
2 results
Wherry, Edgar T. (Edgar Theodore), 1885-1982
2 results
Woolsey, Lester Hood, 1877-1961
2 results
De Witt, Wallace, Jr., 1920-2012
1 results
Faill, Rodger T.
1 results
Glover, Albert D.
1 results
Lesure, Frank Gardner, 1927-
1 results
Pumpelly, Raphael, 1837-1923
1 results
United States. Bureau of Mines
1 results
United States. Bureau of the Census
1 results
United States. Department of Commerce
1 results
Welsh, Robert A.
1 results