Geology, mining, and methane content of the Freeport and Kittanning coalbeds in Indiana and surrounding counties, Pennsylvania
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| Description | report of investigations published in 1979 |
| Author/s |
author: Anthony T. Iannacchione |
| Publication date | January 1, 1979 |
| Language | English |
| Country of origin | |
| Wikipedia link | |
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| Copyright status | |
| Missing/wrong data? | Edit Wikidata item |