Carbonizing properties and petrographic composition of Upper Freeport coal from Morgantown District, Monongalia County, W. Va. : and of Lower Freeport coal from eastern Indiana County, near Cambria County, Pa. /
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| Language: | English |
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| Format: | U.S. Federal Government Document Book E-Resource |
| Physical Description: | 77 p. : ill. |
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