@misc{indiciaea76df6dcf948,
  title = {Geologic map of the Lafayette quadrangle, Adams, Boulder, and Jefferson Counties, Colorado},
  author = {Michael N. Machette},
  year = {1977},
  doi = {10.3133/gq1392},
  url = {https://pubs.usgs.gov/publication/gq1392},
  note = {Source identifier: gq1392}
}