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1
Oil and gas developments in Pennsylvania in 1982 /
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geological Survey, 1983

Government Document Book
2
Oil and gas developments in Pennsylvania in 1978 /
by Piotrowski, Robert G.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geological Survey, 1979

Government Document Book
3
Oil and gas developments in Pennsylvania in 1977 /
by Heyman, Louis, Cozart, Cheryl L.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geological Survey, 1978

Government Document Book
4
Oil and gas developments in Pennsylvania in 1964 /
by Lytle, William S.
Harrisburg, PA. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1965

Government Document Book
5
Oil and gas developments in Pennsylvania in 1970 /
by Lytle, William S., Heyman, Louis, Kelley, Dana R.
Harrisburg, Pa : Pennsylvania, Bureau of Topographic and Geological Survey, 1971

Government Document Book
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