Mining in America : Powder River Basin coal mining, the benefits and challenges : oversight hearing before the Subcommittee on Energy and Mineral Resources of the Committee on Natural Resources, U.S. House of Representatives, One Hundred Thirteenth Congress, first session, Tuesday, July 9, 2013.
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington :
U.S. Government Printing Office,
2014.
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| Online Access: | CONNECT |
