• publisher: Published by the Board of Commissioners for the Second Geological Survey of Pennsylvania
  • creator: J. Peter Lesley , Geological Survey of Pennsylvania
  • contributor: University of Michigan
  • mediatype: texts
  • years: 1885
  • pages: 370
  • language: English
  • notes: "The publications of the Second Geological Survey of Pennsylvania. From 1874 to 1885": 13 p. (at end).
  • download: pdf file