@misc{indiciaeb861cd1d6590,
  title = {Geology of the Gypsum Gap quadrangle, Colorado},
  author = {Fred W. Cater},
  year = {1953},
  doi = {10.3133/tem697},
  url = {https://pubs.usgs.gov/publication/tem697},
  note = {Source identifier: tem697}
}