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Showing 1 - 5 results of 5 for search '"Coal mines and mining Pennsylvania."', query time: 0.21s Refine Results
  1. 1
    Methods of determining the orientations of bedrock fracture systems in southwestern Pennsylvania and northern West Virginia /
    by Bench, B. M.
    Published 1977
    Subjects: “...Coal mines and mining Pennsylvania....”
    Get full text
    Government Document Book
  2. 2
    Selected geologic factors affecting mining of the Pittsburgh coalbed /
    Published 1975
    Subjects: “...Coal mines and mining Pennsylvania....”
    Get full text
    Government Document Book
  3. 3
    Methods of determining the orientations of bedrock fracture systems in southwestern Pennsylvania and northern West Virginia /
    Subjects: “...Coal mines and mining Pennsylvania....”
    Government Document Book
  4. 4
    The Pittsburgh coal bed ; its early history and development /
    Subjects: “...Coal mines and mining Pennsylvania Pittsburgh....”
    Book
  5. 5
    Coal and coke resource analysis : western Pennsylvania, northern West Virginia /
    Published 1992
    Subjects: “...Coal mines and mining Pennsylvania History....”
    Government Document Microform Book
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