@misc{indiciaef44ca8c0e4c8,
  title = {Geologic map of the Casa Grande quadrangle, Colfax County, New Mexico and Las Animas County, Colorado},
  author = {C. L. Pillmore},
  year = {1969},
  doi = {10.3133/gq823},
  url = {https://pubs.usgs.gov/publication/gq823},
  note = {Source identifier: gq823}
}