@misc{indiciaeb96cae686bad,
  title = {Bedrock geology of the Kassler quadrangle, Colorado},
  author = {Glenn R. Scott},
  year = {1963},
  doi = {10.3133/pp421b},
  url = {https://pubs.usgs.gov/publication/pp421B},
  note = {Source identifier: pp421B}
}