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1
Preliminary report : geology and mineral resources of the New Florence quadrangle, Pennsylvania /
by Shaffner, Marchant N. (Marchant Nissley), 1897-
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1951

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Book
2
Coal reserves in Somerset County, Pennsylvania /
by Reese, John F.
[Harrisburg] : Bureau of Topographic and Geological Survey, 1922

Book
3
Coal beds in northern Somerset County, Pennsylvania /
by Sisler, James D. (James Donaldson), 1894-
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geological Survey, 1923

Government Document Book
4
Geology and mineral resources of the Donegal quadrangle, Pennsylvania /
by Shaffner, Marchant N. (Marchant Nissley), 1897-
Harrisburg, PA. : Pennsylvania Bureau of Topographic and Geologic Survey, 1963

Government Document Book
5
Geology and mineral resources of the New Florence quadrangle, Pennsylvania.
by Shaffner, Marchant N. (Marchant Nissley), 1897-
[Harrisburg, Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1958

Government Document Book
7
Coal beds in southern Somerset County, Pennsylvania /
by Sisler, James D. (James Donaldson), 1894-
[Harrisburg, Pa.] : Bureau of Topographic and Geological Survey, 1923

Book
8
Oil and gas developments in Pennsylvania in 1958 /
by Lytle, William S.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1959

Book
9
Preliminary report : geology and mineral resources of southern Somerset County /
by Flint, Norman K. (Norman Keith), 1921-
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1956

Government Document Book
10
Oil and gas developments in Pennsylvania in 1960 /
by Lytle, William S.
[Harrisburg, Pa.] : Pennsylvania, Bureau of Topographic and Geologic Survey, 1961

Government Document Book
11
Geology and mineral resources of the New Florence quadrangle, Pennsylvania.
by Shaffner, Marchant N. (Marchant Nissley), 1897-
[Harrisburg, Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1958

Government Document Book
12
Oil and gas developments in Pennsylvania in 1974 /
by Lytle, William S.
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1975

Government Document Book
13
Oil and gas developments in Pennsylvania in 1975 /
by Lytle, William S., Piotrowski, Robert G., Heyman, Louis
Harrisburg, Pa. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1976

Government Document Book
14
Oil and gas developments in Pennsylvania in 1959 /
by Lytle, William S.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1960

Government Document Book
15
Preliminary report, geology and mineral resources of southern Somerset County, Pennsylvania /
by Flint, Norman K. (Norman Keith), 1921-
[Harrisburg] Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey, 1956

Book
16
Geology and mineral resources of the Donegal quadrangle, Pennsylvania /
by Shaffner, Marchant N. (Marchant Nissley), 1897-
Harrisburg, PA. : Pennsylvania Bureau of Topographic and Geologic Survey, 1963

Government Document Book
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