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1
Author: Cathcart, Stanley Holman.
Published 1931
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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2
Author: Harper, John A.
Published 1992
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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3
Author: Harper, John A.
Published 1989
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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4
Published 1916
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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5
Author: Ashley, Geo. H. 1866-1951.
Published 1922
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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6
Author: Harper, John A.
Published 1990
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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7
Author: Sherrill, Richard Ellis, 1899-
Published 1939
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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8
Author: Shaw, E. W. 1881-1935.
Published 1911
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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9
Author: Fettke, Charles R. 1888-1959.
Published 1940
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania Fayette Co....”
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10
Author: Fettke, Charles R. 1888-1959.
Published 1946
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania Washington County....”
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11
Author: Ebright, John R.
Published 1951
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania Clinton County....”
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12
Author: Bergsten, John M., Heeren, Lillian A.,
Published 1961
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania Foxburg quadrangle....”
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13
Published 1921
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania Philadelphia....”
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14
Author: Flaherty, Kathy J.
Published 2002
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
Click here for the online version.
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15
Published 1911
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania Carnegie quadrangle....”
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16
Author: Griswold, W. T., 1859-1931.
Published 1907
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania....”
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17
Author: McCoy, Kaycee L.
Published 2007
Record Source: Published Materials
Subjects and Genres: '; “...Natural gas Pennsylvania Maps....”
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