@misc{indiciae63ad543b5f82,
  title = {Geologic map of the Mount Richthofen Quadrangle and the western part of the Fall River Pass Quadrangle, Grand and Jackson counties, Colorado},
  author = {J.M. O’Neill},
  year = {1981},
  doi = {10.3133/i1291},
  url = {https://pubs.usgs.gov/publication/i1291},
  note = {Source identifier: i1291}
}