@misc{indiciae84cf25fb45d2,
  title = {Geologic map of the Medicine Mountain quadrangle, Pennington County, South Dakota},
  author = {James Clifford Ratte},
  year = {1980},
  doi = {10.3133/ofr801083},
  url = {https://pubs.usgs.gov/publication/ofr801083},
  note = {Source identifier: ofr801083}
}