@misc{indiciae9b347a9a0dc8,
  title = {Report upon United States geological surveys west of the one hundredth meridian, Volume III: Supplement -- geology},
  author = {George Montague Wheeler and John J. Stevenson},
  year = {1881},
  doi = {10.3133/70039250},
  url = {https://pubs.usgs.gov/publication/70039250},
  note = {Source identifier: 70039250}
}