Summary ground-water resources of Butler County, Pennsylvania /

by Poth, Charles W.
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 1973

The ground-water program for Pennsylvania /

Harrisburg [Pa.] : Pennsylvania Topographic and Geologic Survey, 1975
2nd ed.

Geology and ground-water resources of northern Mercer County, Pennsylvania /

by Schiner, George R., 1926-
Harrisburg, Pa. : [Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey], 1976

Groundwater resources of Delaware County, Pennsylvania /

by Balmer, Wayne T.
Harrisburg : Pennsylvania Geological Survey, 1996

Water resources investigations in Pennsylvania 1965 /

Washington, D.C. : United States Department of the Interior, Geological Survey, 1965

Geology and groundwater resources of western Crawford County, Pennsylvania /

by Schiner, George R., 1926-, Gallaher, John T., 1921-
Harrisburg : Pennsylvania Geological Survey : additional copies, State Book Store, 1979

Geology and ground-water resources of northern Mercer County, Pennsylvania /

by Schiner, George R., 1926-, Kimmel, Grant E.
Harrisburg : The Survey, 1976

Geology and groundwater resources of western Crawford County, Pennsylvania /

Harrisburg, Pa. : [Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey], 1979

Ground-water resources of Lackawanna County, Pennsylvania /

by Hollowell, Jerrald R., Koester, Harry E.
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 1975

Summary, ground-water resources of Lancaster County, Pennsylvania /

by Poth, Charles W.
Harrisburg : Pennsylvania Geological Survey, 1977

Geology and ground-water resources of northern Mercer County, Pennsylvania /

by Schiner, George R., 1926-, Kimmel, Grant E.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1976

Groundwater resources of Erie County, Pennsylvania /

by Richards, David B. (David Barton)
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1987