@misc{indiciaeb49bbe54fc88,
  title = {Preliminary geologic map of part of the Minnekahta quadrangle, Fall River County, South Dakota, fig. 3},
  author = {V.R. Wilmarth and R. Daniel Smith},
  year = {1954},
  doi = {10.3133/ofr55199},
  url = {https://pubs.usgs.gov/publication/ofr55199},
  note = {Source identifier: ofr55199}
}