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  1. Report of Research on Pennsylvania's Coal Resources IPR-19

    Resource Type: Report
    Creator: C.J. Zink, H.B. Charmbury, Joseph Kershetsky, R.P. Aikman, John Todhunter, G.L. Barthauer, John Seddon, William Sturm, M.E. Bell, C.L. Hosler, E.F. Osborn, R.Stefanko, W. Spackman, P.L. Walker, Jr., and H.L. Lovell
    Keyword: Coal Research Board and Coal Resources
    Publisher: Pennsylvania State University and College of Mineral Industries
    Object Type: GenericWork
    Date Uploaded: 2015-11-11T21:08:44Z
  2. Report of Research on Pennsylvania's Coal Resources IPR-20

    Resource Type: Report
    Creator: H.B. Charmbury, C.J. Zink, Robert W. Rissinger, Joseph Kershetsky, R.P. Aikman, John Todhunter, G.L. Barthauer, John Seddon, and William Sturm
    Keyword: Interim Progress Report and Coal Resources
    Publisher: Department of Mines and Mineral Industries
    Object Type: GenericWork
    Date Uploaded: 2015-11-11T21:00:13Z