@misc{indiciae13c347473d23,
  title = {Preliminary geologic map of the east central part of the Burdock quadrangle, Fall River County, South Dakota},
  author = {R. W. Schnabel},
  year = {1958},
  doi = {10.3133/mf74},
  url = {https://pubs.usgs.gov/publication/mf74},
  note = {Source identifier: mf74}
}