@misc{indiciae6607ea9c05a4,
  title = {Preliminary Geologic Map of the North-Central Part of the Alamosa 30' x 60' Quadrangle, Alamosa, Conejos and Costilla Counties, Colorado},
  author = {Michael N. Machette and Ren A. Thompson and Theodore R. Brandt},
  year = {2008},
  doi = {10.3133/ofr20081124},
  url = {https://pubs.usgs.gov/publication/ofr20081124},
  note = {Source identifier: ofr20081124}
}