• publisher: Pub. by the Board of Commissioners for the Second Geological Survey
  • creator: Pennsylvania
  • contributor: University of Michigan
  • mediatype: texts
  • years: 1880
  • pages: 799
  • language: English
  • notes: "Appendix A to Report of progress R (not listed in above index) was issued in 1881 with title: Drillings for coal in Sergeant township, McKean County. A correspondence by N.F. Jones, J.P. Lesley, and Chas. A. Ashburner.
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