@misc{indiciae1bc29265d4b6,
  title = {Geologic map of the Lyons quadrangle, Boulder County, Colorado},
  author = {William A. Braddock and R.G. Houston and R. B. Colton and J. C. Cole},
  year = {1988},
  doi = {10.3133/gq1629},
  url = {https://pubs.usgs.gov/publication/gq1629},
  note = {Source identifier: gq1629}
}