@misc{indiciae793eae4f126a,
  title = {Preliminary geologic map of parts of the Saylorsburg quadrangle, Pennsylvania},
  author = {Jack Burton Epstein},
  year = {1978},
  doi = {10.3133/ofr78170},
  url = {https://pubs.usgs.gov/publication/ofr78170},
  note = {Source identifier: ofr78170}
}