@misc{indiciae0c3e0813342b,
  title = {Geologic map of the Black Mountain quadrangle, Arizona},
  author = {Medora H. Krieger},
  year = {1969},
  doi = {10.3133/ofr69142},
  url = {https://pubs.usgs.gov/publication/ofr69142},
  note = {Source identifier: ofr69142}
}