@misc{indiciaeedebd612fb20,
  title = {Geology of the Gypsum Gap quadrangle, Colorado},
  author = {Fred W. Cater},
  year = {1955},
  doi = {10.3133/gq59},
  url = {https://pubs.usgs.gov/publication/gq59},
  note = {Source identifier: gq59}
}