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A summary of the U.S. Geological Survey 1999 resource assessment of selected coal zones in the northern Rocky Mountains and Great Plains region, Wyoming, Montana, and North Dakota
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Evaluation of economically extractable coal beds in the Gillette coal field, Powder River Basin, Wyoming and Montana
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Fly ash, from cradle to grave
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Quality of economically extractable coal beds in the Gillette coal field as compared with other Tertiary coal beds in the Powder River Basin, Wyoming and Montana
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