A digital resource model of the Upper Pennsylvanian Pittsburgh coal bed, Monongahela Group, northern Appalachian basin coal region, USA
| Autor: | Ruppert, Leslie F *, Tewalt, Susan J, Bragg, Linda J, Wallack, Rachel N |
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| Zdroj: | In International Journal of Coal Geology 1999 41(1):3-24 |
| Databáze: | ScienceDirect |
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Full Text from ScienceDirect