@misc{indiciae47c06d13bedf,
  title = {Geologic map of the Sable quadrangle, Adams and Denver Counties, Colorado},
  author = {Robert M. Lindvall},
  year = {1983},
  doi = {10.3133/gq1567},
  url = {https://pubs.usgs.gov/publication/gq1567},
  note = {Source identifier: gq1567}
}