Information circular.

The geology of Pennsylvania /
Published: (1999)

Educational series.

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

Progress report.

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

Roadside geology of Pennsylvania /
by: VanDiver, Bradford B.
Published: (1990)

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)

Pennsylvania geology.

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

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

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

Topographic and geological survey of Pennsylvania.
Published: (1912)

Topographic and geological survey of Pennsylvania.
Published: (1908)

Topographic and geologic survey /
Published: (1911)

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)

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

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

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

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

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

Bituminous coal fields of Pennsylvania /
Published: (1926)

Field guide to the anthracite coal basin of eastern Pennsylvania / by Jane R. Eggleston, William E. Edmunds, with contributions by Richard P. Nickelson, Michael C. Korb.
by: Eggleston, Jane R.
Published: (1981)

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

Ground water in northwestern Pennsylvania /
by: Leggette, R. M. (Ralph Maxwell), 1899-
Published: (1936)

Ground water in northeastern Pennsylvania /
by: Lohman, S. W. (Stanley William), 1907-1992
Published: (1937)

Oil-bearing sands in southwestern Pennsylvania : a preliminary report /
by: Matteson, L. S. (Lawrence Stanley), 1912-
Published: (1944)

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

Tully (Middle Devonian) to Queenston (Upper Ordovician) correlations in the subsurface of western Pennsylvania /
by: Heyman, Louis
Published: (1977)

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

Lower paleozoic carbonate rocks in Maryland and Pennsylvania /
by: Sando, William Jasper
Published: (1960)

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

Guide to the geology from Dauphin to Sunbury /
by: Willard, Bradford, 1894-
Published: (1939)

Glacial deposits outside the Wisconsin terminal moraine in Pennsylvania /
by: Leverett, Frank, 1859-1943
Published: (1934)

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