@misc{indiciae87e550bb9f1e,
  title = {Preliminary geologic and structure map of the southeast part of the Cascade Springs quadrangle, Fall River County, South Dakota},
  author = {Edwin V. Post},
  year = {1957},
  doi = {10.3133/tem1055},
  url = {https://pubs.usgs.gov/publication/tem1055},
  note = {Source identifier: tem1055}
}