@misc{indiciae9cfa002039b2,
  title = {Geology of the Oahe quadrangle, South Dakota},
  author = {Dwight Raymond Crandell},
  year = {1955},
  doi = {10.3133/gq53},
  url = {https://pubs.usgs.gov/publication/gq53},
  note = {Source identifier: gq53}
}