1
Author: Flaherty, Kathy J.
Published 2002
Record Source: Published Materials
Subjects and Genres: '; ...Natural gas Pennsylvania....
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Book
3
Author: Sherrill, Richard Ellis, 1899-
Published 1939
Record Source: Published Materials
Subjects and Genres: '; ...Natural gas Pennsylvania....
Book
4
Author: Ebright, John R.
Published 1951
Record Source: Published Materials
Subjects and Genres: '; ...Natural gas Pennsylvania Clinton County....
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5
Author: Fettke, Charles R. 1888-1959.
Published 1940
Record Source: Published Materials
Subjects and Genres: '; ...Natural gas Pennsylvania Fayette Co....
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6
Published 1857
Record Source: Published Materials
Subjects and Genres: '; ...Natural history New Jer...
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7
Published 1911
Record Source: Published Materials
Subjects and Genres: '; ...Natural gas Pennsylvania Carnegie quadrangle....
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8
Author: Clemson, Thomas Green, 1807-1888.
Published 1834
Record Source: Published Materials
Subjects and Genres: '; ...SP6 Natural history....
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