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  1. Pennsylvania bituminous coal production 1881-1930 (by county)

    Resource Type: Dataset and
    Creator: Penn State University Libraries
    Keyword: bituminous coal, production, pennsylvania, county
    Subject: Bituminous coal pennsylvania
    Location: Pennsylvania, Pennsylvania, United States
    Object Type: GenericWork
    Date Uploaded: 2014-10-03T18:37:03Z