@misc{indiciae819c582005ad,
  title = {Geologic map of the Easton quadrangle, New Jersey-Pennsylvania},
  author = {Avery Ala Drake},
  year = {1967},
  doi = {10.3133/gq594},
  url = {https://pubs.usgs.gov/publication/gq594},
  note = {Source identifier: gq594}
}