@misc{indiciae93519224eaea,
  title = {Geologic map of the Squaw Pass quadrangle, Clear Creek, Jefferson, and Gilpin Counties, Colorado},
  author = {Douglas M. Sheridan and Sherman P. Marsh},
  year = {1976},
  doi = {10.3133/gq1337},
  url = {https://pubs.usgs.gov/publication/gq1337},
  note = {Source identifier: gq1337}
}