@misc{indiciaebfc1763fddd8,
  title = {Geology of the New Tripoli Quadrangle, Lehigh, Berks, Schuylkill, and Carbon counties, Pennsylvania},
  author = {Jack Burton Epstein and Peter T. Lyttle},
  year = {1993},
  doi = {10.3133/b1994},
  url = {https://pubs.usgs.gov/publication/b1994},
  note = {Source identifier: b1994}
}