Pennsylvania geology.

A syllabus of Pennsylvania geology and mineral resources /
by: Ashley, Geo. H. (George Hall), 1866-1951
Published: (1931)

Biennial report of the topographic and geologic survey of Pennsylvania.
Published: (1914)

Guidebook to the geology of the Pennsylvania Turnpike ; Carlisle to Irwin /
by: Cleaves, Arthur B. (Arthur Bailey), 1905-
Published: (1949)

Annotated bibliography of Pennsylvania geology ; supplement to 1969.
by: Cramer, Howard Ross, 1925-
Published: (1972)

Outstanding scenic geological features of Pennsylvania /
by: Geyer, Alan R.
Published: (1979)

Stratigraphic correlation chart of Pennsylvania /
Published: (1986)

Geology and mineral resources of the Washingtonville and Millville quadrangles : Montour, Columbia, and Northumberland counties, Pennsylvania /
by: Way, John H.
Published: (1993)

Geology and mineral resources of the Lock Haven quadrangle, Clinton and Lycoming counties, Pennsylvania /
Published: (1977)

Topographic and geologic survey /
Published: (1911)

Geology and mineral resources of the Blandburg, Tipton, Altoona, and Bellwood quadrangles : Blair, Cambria, Clearfield and Centre counties, Pennsylvania /
by: Faill, Rodger T.
Published: (1989)

Geology and mineral resources of the Carlisle and Mechanicsburg quadrangles, Cumberland county, Pennsylvania /
Published: (1978)

Anthracite basins of eastern Pennsylvania : Pottsville to Shamokin, Pennsylvania, July 13-16, 1989 /
by: Eggleston, Jane R.
Published: (1989)

A few facts regarding the Geological survey of Pennsylvania : exposing the erroneous statements and claims of J. P. Lesley, secretary of the American iron association.
Published: (1859)

Guidebook for field trips, Pittsburgh meeting, 1959 /
Published: (1959)

Information circular.

Educational series.

Progress report.

Sinkholes in Pennsylvania /
by: Kochanov, William E., 1952-
Published: (1999)

Rocks and minerals of Pennsylvania /
by: Barnes, John Henry, 1946-
Published: (1991)

Valley Forge National Historical Park, Montgomery and Chester Counties /
by: Wiswall, C. Gil
Published: (1993)

Ground water in south-central Pennsylvania,
by: Lohman, S. W. (Stanley William), 1907-1992
Published: (1938)

Bituminous coal fields of Pennsylvania /
Published: (1926)

Removal of lateral inconsistency from seismic data by means of consistent strata /
by: Sepassi, Bahman
Published: (1978)

Pennsylvania geological publications.
Published: (1937)

Geology and biology of Pennsylvania caves /
Published: (1976)

Geologic map of Pennsylvania : Pennsylvania Geologic Survey, 4th ser /
Published: (1960)

Geologic map of Pennsylvania /
Published: (2000)

Water-resources activities of the U.S. Geological Survey in Pennsylvania.
Published: (1989)

Geology of the Hanover-York district, Pennsylvania /
by: Jonas, Anna I. (Anna Isabel), 1881-1974, et al.
Published: (1944)

Geologic map of Pennsylvania : 1980 /
Published: (1980)

Geology of the Hanover-York district, Pennsylvania /
by: Jonas, Anna I. (Anna Isabel), 1881-1974, et al.
Published: (1944)

Geology of the Ellsworth quadrangle, Pennsylvania /
by: Berryhill, Henry L., Jr. (Henry Lee), 1921-2013
Published: (1964)

Geology of the Amity quadrangle, Pennsylvania /
by: Berryhill, Henry L., Jr. (Henry Lee), 1921-2013
Published: (1964)

Geology of the oil and gas fields of southwestern Pennsylvania /
by: Harper, John A.
Published: (1987)

U.S. Geological Survey programs in Pennsylvania.
Published: (1996)

Geologic map index of Pennsylvania, 1951-1971 /
by: McIntosh, Willard L.
Published: (1973)