@misc{indiciae089e804a1676,
  title = {Preliminary geologic map of the Ajo 1° by 2° quadrangle, Arizona},
  author = {Katherine Kahle and Gordon Haxel and Dyan Conway},
  year = {1978},
  doi = {10.3133/ofr781096},
  url = {https://pubs.usgs.gov/publication/ofr781096},
  note = {Source identifier: ofr781096}
}