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2018
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1
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Coal Lignite And Peat : Elcock, Deborah,
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2006
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Coal Miner : Aurand, Harold W.
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1992
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Coal Miners Pennsylvania History : Aurand, Harold W.
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Coal Miners Pennsylvania Labor Unions History : Aurand, Harold W.
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1971
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Coal Miners Pensions : United States.
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Coal Mines And Mining Data Processing : Daniels, Jeffrey J.,
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Coal Mines And Mining Explosives : Munroe, Charles E.
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Coal Mines And Mining Pennsylvania History : Burgan, Michael.
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Coal Purchasing : Randall, Dwight T.,
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Coal Trade Environmental Aspects : Berg, John C.,
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Coal Trade Government Policy : Berg, John C.,
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