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    The composition of the basaltic gas phase / by Nordlie, Bert E.

    Published 1971
    Government Document Book
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    Rock-strata gases of the Cripple Creek district, Colo. and their effect on mining / by Denny, E. H. (Edward H.), 1887-1971

    Published 1930
    Government Document Book
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    Near-surface anomalies associated with faults and gas accumulations in western Pennsylvania by Roberts, Alan A.

    Published 1985
    Government Document Microfilm Book
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