@misc{indiciae70bb84b166fc,
  title = {Preliminary geologic map of the west central part of the Burdock quadrangle, Fall River County, South Dakota},
  author = {R. W. Schnabel and L.J. Charlesworth},
  year = {1958},
  doi = {10.3133/mf71},
  url = {https://pubs.usgs.gov/publication/mf71},
  note = {Source identifier: mf71}
}