@misc{indiciae90c5eff89d3b,
  title = {Geologic map of the Bushkill quadrangle, Pennsylvania-New Jersey},
  author = {Donald Clayton Alvord and Avery Ala Drake},
  year = {1971},
  doi = {10.3133/gq908},
  url = {https://pubs.usgs.gov/publication/gq908},
  note = {Source identifier: gq908}
}