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Start Over You searched for: Degree PHD Remove constraint Degree: PHD Year 2016 Remove constraint Year: 2016 Committee Member Matthew Reimherr Remove constraint Committee Member: Matthew Reimherr

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2. ANALYSIS OF THE CHANGES IN THE OPERATIONAL STRUCTURES AND SAFETY MEASURES OF U.S. UNDERGROUND COAL MINES ACROSS DIFFERENT MINE-SIZE CATEGORIES, 2000-2014

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