@misc{indiciae45062533b324,
  title = {Geologic map of the Aspen quadrangle, Pitkin County, Colorado},
  author = {Bruce Bryant},
  year = {1971},
  doi = {10.3133/gq933},
  url = {https://pubs.usgs.gov/publication/gq933},
  note = {Source identifier: gq933}
}