@misc{indiciaea8c50b92a15c,
  title = {Geologic map of the Henderson Ridge quadrangle, Garfield County, Colorado},
  author = {Henry W. Roehler},
  year = {1973},
  doi = {10.3133/gq1113},
  url = {https://pubs.usgs.gov/publication/gq1113},
  note = {Source identifier: gq1113}
}