@misc{indiciaeaab1fd9817fa,
  title = {Preliminary geologic map of the northwest part of the Burdock Quadrangle, Fall River and Custer counties, South Dakota},
  author = {R. W. Schnabel and L.J. Charlesworth},
  year = {1957},
  doi = {10.3133/tem1057},
  url = {https://pubs.usgs.gov/publication/tem1057},
  note = {Source identifier: tem1057}
}