@misc{indiciaef2383d8b69ec,
  title = {Geologic map of the Nazareth Quadrangle, Northampton County, Pennsylvania},
  author = {John M. Aaron and Avery Drake},
  year = {1997},
  doi = {10.3133/ofr9733},
  url = {https://pubs.usgs.gov/publication/ofr9733},
  note = {Source identifier: ofr9733}
}