@misc{indiciae76c1641ea9cc,
  title = {Preliminary geologic and structure map of the west-central part of the Cascade Springs Quadrangle, Fall River County, South Dakota},
  author = {Edwin V. Post and Norman P. Cupples},
  year = {1957},
  doi = {10.3133/tem1052},
  url = {https://pubs.usgs.gov/publication/tem1052},
  note = {Source identifier: tem1052}
}