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1
Publications of the United States Geologic Survey relating to Pennsylvania /
Harrisburg, Pa. : Wm. Stanley Ray, State Printer, 1914

Government Document Book
2
Publications on the geology of Pennsylvania /
Harrisburg : Pennsylvania Dept. of Environmental Resources, Topographic and Geologic Survey, 1977

Book
3
List of publications /
[Harrisburg, Pa.] : Pennsylvania Dept. of Internal Affairs, 1928

Government Document Book
4
Annotated bibliography of Pennsylvania geology : supplement to 1979 /
Harrisburg : The Survey, 1986

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Book
5
Publications on the geology of Pennsylvania /

Serial
6
... Service and list of publications.

Government Document Serial
7
Publications of the United States Geologic Survey relating to Pennsylvania /
Harrisburg : Wm. Stanley Ray, State Printer, 1914

Book
8
Publications on the geology of Pennsylvania /

Audio
9
Annotated bibliography of Pennsylvania geology : supplement to 1969 /
by Cramer, Howard Ross, 1925-
Harrisburg, PA. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1972

Government Document Book
10
Annotated bibliography of Pennsylvania geology : supplement to 1959 /
by Cramer, Howard Ross, 1925-
Harrisburg, PA. : Pennsylvania, Bureau of Topographic and Geologic Survey, 1965

Government Document Book
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