Oil and gas sands in the north half of the Pittsburgh quadrangle, Penna. /
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| Corporate Author: | |
| Format: | Book |
| Language: | English |
| Published: |
[Harrisburg, Pa.] :
Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geological Survey,
1923.
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| Series: | Progress report (Pennsylvania. Bureau of Topographic and Geologic Survey) ;
73. |
| Subjects: |
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