@misc{indiciae1cbbea8fb17c,
  title = {Quaternary geology and geomorphic history of the Kassler quadrangle, Colorado},
  author = {Glenn R. Scott},
  year = {1963},
  doi = {10.3133/pp421a},
  url = {https://pubs.usgs.gov/publication/pp421A},
  note = {Source identifier: pp421A}
}