@misc{indiciae6c8701a65852,
  title = {Geologic map of the Scenic area, Pennington, Shannon and Custer Counties, South Dakota},
  author = {R.U. King and W. H. Raymond},
  year = {1971},
  doi = {10.3133/i662},
  url = {https://pubs.usgs.gov/publication/i662},
  note = {Source identifier: i662}
}