@misc{indiciaea430fe4b57dd,
  title = {Geologic map of the Fredonia 30' x 60' quadrangle, Mohave and Coconino counties, northern Arizona},
  author = {George H. Billingsley and Susan S. Priest and Tracey J. Felger},
  year = {2008},
  doi = {10.3133/sim3035},
  url = {https://pubs.usgs.gov/publication/sim3035},
  note = {Source identifier: sim3035}
}