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21Published 1985Subjects: “...Coal gasification....”
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24by Lazzari, SalvatoreSubjects: “...Coal leases Government policy United States....”
Published 1988
Microform Book -
25by Gushee, David E.Subjects: “...Coal trade Environmental aspects United States....”
Published 1978
Microform Book -
26by Gushee, David E.Subjects: “...Coal trade Environmental aspects....”
Published 1979
Microform Book -
27Published 1979Subjects: “...Coal mines and mining Bibliography....”
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35Tabkes for Comparison of Energy Contents and Prices of Coal, Crude Oil, Natural Gas and Electricity.Published 1975Subjects: “...Coal....”
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36Published 1979Subjects: “...Coal....”
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Government Document eBook -
37
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39Published 1979Subjects: “...Coal....”
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40