@misc{indiciaea3e9b4ff0da6,
  title = {Geologic reconnaissance map of the Chris Mountain and Pagosa Springs quadrangles, Archuleta County, Colorado},
  author = {W. J. Hail},
  year = {1971},
  doi = {10.3133/ofr71142},
  url = {https://pubs.usgs.gov/publication/ofr71142},
  note = {Source identifier: ofr71142}
}