• publisher: Harrisburg
  • creator: Pennsylvania. State Geologist (1836-1841) Rogers, Henry D. (Henry Darwin), 1808-1866
  • contributor: Rogers, Henry D. (Henry Darwin), 1808-1866
  • Keyword: Geology Pennsylvania.
  • years: 1836-42.
  • pages: 6v.
  • notes: By Henry D. Rogers, State Geologist.
  • download: pdf file