@misc{indiciae2543acb99c10,
  title = {Preliminary geologic and structure map of the east-central part of the Cascade Springs quadrangle, Fall River County, South Dakota},
  author = {Edwin V. Post and Donald W. Lane},
  year = {1959},
  doi = {10.3133/mf210},
  url = {https://pubs.usgs.gov/publication/mf210},
  note = {Source identifier: mf210}
}