@misc{indiciae5559bef1dabd,
  title = {Geologic map of the Trinchera Peak Quadrangle, Costilla, Huerfano, and Las Animas counties, Colorado},
  author = {A. R. Wallace and D. A. Lindsey},
  year = {1996},
  doi = {10.3133/mf2312a},
  url = {https://pubs.usgs.gov/publication/mf2312A},
  note = {Source identifier: mf2312A}
}