@misc{indiciaee0a74446d703,
  title = {Preliminary geologic map of the Gold Hill Quadrangle, Boulder County, Colorado},
  author = {Dolores J. Gable},
  year = {1977},
  doi = {10.3133/ofr77849},
  url = {https://pubs.usgs.gov/publication/ofr77849},
  note = {Source identifier: ofr77849}
}