@misc{indiciae5d4eeea5c942,
  title = {Geologic map and cross sections of the Dragoon Mountains, southeastern Arizona},
  author = {Harald Drewes},
  year = {1987},
  doi = {10.3133/i1662},
  url = {https://pubs.usgs.gov/publication/i1662},
  note = {Source identifier: i1662}
}