@misc{indiciae24aba9f12c74,
  title = {Geologic map of the Valle 30' x 60' quadrangle, Coconino County, northern Arizona},
  author = {George H. Billingsley and Tracey J. Felger and Susan S. Priest},
  year = {2006},
  doi = {10.3133/sim2895},
  url = {https://pubs.usgs.gov/publication/sim2895},
  note = {Source identifier: sim2895}
}