Investigation of lower coal beds in Georges Creek and north part of upper Potomac basins, Allegany and Garrett Counties, Md. : reserves, petrographic and chemical characteristics of coals, and stratigraphy of area.
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Corporate Author: | |
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Other Authors: | , , , , , , , |
Format: | Government Document Book |
Language: | English |
Published: |
Washington :
U.S. Govt. Print. Off,
1949.
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Series: | Technical paper (United States. Bureau of Mines) ;
725. |
Subjects: |