@misc{indiciae48a8da65f5e1,
  title = {Preliminary geologic and structure maps of northwest part of the Cascade Springs quadrangle, Fall River County, South Dakota},
  author = {Edwin V. Post and Norman P. Cuppels},
  year = {1959},
  doi = {10.3133/mf207},
  url = {https://pubs.usgs.gov/publication/mf207},
  note = {Source identifier: mf207}
}