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Montana Bureau of Mines and Geology,
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Wyoming
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Mixed
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1. Anderson and Knobloch coal horizons and potential for methane development, Powder River Basin, Montana
Van Voast, Wayne A. Montana Bureau of Mines and Geology,.
2. Clinker distribution and age in the Powder River structural basin /
Heffern, Edward L., cartographer. Montana Bureau of Mines and Geology,.
3. Geologic map of the Bridger 30ʹ x 60ʹ quadrangle, Montana
Lopez, David A. Montana Bureau of Mines and Geology,.