Oil and gas sands in the north half of the Pittsburgh quadrangle, Penna. /
| Autore principale: | |
|---|---|
| Ente Autore: | |
| Natura: | Libro |
| Lingua: | English |
| Pubblicazione: |
[Harrisburg, Pa.] :
Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geological Survey,
1923.
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| Serie: | Progress report (Pennsylvania. Bureau of Topographic and Geologic Survey) ;
73. |
| Soggetti: |
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