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2“...United States Powder River Basin. fast (OCoLC)fst01310701...”
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3by Luppens, James A. (James Alan), 1946-“...United States Powder River Basin. fast (OCoLC)fst01310701...”
Published 2008
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4Published 2012“...United States Powder River Basin. fast (OCoLC)fst01310701...”
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Government Document eBook -
5Published 2013“...United States Powder River Basin. fast (OCoLC)fst01310701...”
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Government Document eBook -
6“...United States Powder River Basin. fast (OCoLC)fst01310701...”
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Government Document eBook