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Elkton-Wilmington folio, Maryland-Delaware-New Jersey- Pennsylvania

Bascom, Florence
Washington : U.S. Geological Survey, 1920. 1920

Geology and mineral resources of the Butler and Zelienople quadrangles, Pennsylvania

Richardson, G. B. (George Burr), 1872-1949, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1936. 1936

Geology and mineral resources of the Honeybrook and Phoenixville quadrangles, Pennsylvania

Bascom, F. (Florence), 1862-1945 author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1938. 1938

Geology and mineral resources of the Middletown quadrangle, Pennsylvania

Stose, George Willis, 1869-1960, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1933. 1933

Geology of the McCalls Ferry-Quarryville district, Pennsylvania

Knopf, Eleanora Frances Bliss, 1883- author.
[Washington, D.C.] : Department of the Interior, U.S. Geological Survey, 1929. 1929

Geology of the New Tripoli quadrangle, Lehigh, Berks, Schuylkill, and Carbon counties, Pennsylvania

Epstein, Jack Burton, 1935-
[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by Map Distribution, 1993. 1993

Geology of the New Tripoli quadrangle, Lehigh, Berks, Schuylkill, and Carbon counties, Pennsylvania

Epstein, Jack Burton, 1935- author.
[Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1993. 1993

Geology of the west-central part of the southern anthracite field and adjoining areas, Pennsylvania

Wood, Gordon H. (Gordon Harry), 1919- author.
Washington : U.S. Department of the Interior, Geological Survey, 1969. 1969

The Helderberg limestone of central Pennsylvania

Reeside, John B. (John Bernard), 1889-1958, author.
Washington : Department of the Interior, United States Geological Survey, 1917. 1917

Historical sketch of geological explorations in Pennsylvania and other states,

Lesley, J. P. (J. Peter), 1819-1903.
Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1876. 1876

Mineral resources of the Elders Ridge quadrangle, Pennsylvania

Stone, Ralph W. (Ralph Walter), 1876-1964, author.
Washington, D.C. : Department of the Interior, United States Geological Survey, 1905. 1905

Oil and gas fields of the Carnegie quadrangle, Pennsylvania

Munn, M. J. (Malcolm John), 1874-1949 author.
Washington, D.C. : Department of the Interior, United States Geological Survey, 1911. 1911

Report of progress in the Clearfield and Jefferson district of the bituminous coal-fields of western

Platt, Franklin, 1844-1900.
Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1875. 1875

Report of progress in the Greene and Washington district of the bituminous coal-fields of western Pe

Stevenson, John J. (John James), 1841-1924.
Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1876] 1876

The resuscitation of the term Bryn Mawr gravel

Bascom, F. (Florence), 1862-1945 author.
[Washington] : [Department of the Interior, United States Geological Survey], [1925] 1924

The Shenango Formation (Mississippian) in northwestern Pennsylvania

Kimmel, Grant E., author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1970. 1970

Some linguloid shells from the late Devonian and early carboniferous rocks of Pennsylvania and Ohio

Girty, George Herbert, 1869-1939, author.
Washington : United States Department of the Interior, Geological Survey, 1939. 1939

Some structural features of the northern anthracite coal basin, Pennsylvania

Darton, Nelson Horatio, 1865-1948, author.
Washington : United States Department of the Interior, Geological Survey, 1940. 1939

Studies in peat.

Cameron, Cornelia C., 1911-1994, author.
[Washington, D.C.] : United States Department of the Interior, Geological Survey, 1970. 1971

Geology of the Hanover-York district, Pennsylvania

Jonas, Anna I. (Anna Isabel), 1881-1974 author.
Washington : United States Department of the Interior, Geological Survey, [1944] 1944

Elders Ridge folio, Pennsylvania

Stone, Ralph W. (Ralph Walter), 1876-1964
Washington, D.C. : U.S. Geological Survey, 1905. 1905