@misc{indiciae831de2600115,
  title = {Geology of the Burdock quadrangle, Fall River and Custer Counties, South Dakota},
  author = {Robert W. Schnabel},
  year = {1963},
  doi = {10.3133/b1063f},
  url = {https://pubs.usgs.gov/publication/b1063F},
  note = {Source identifier: b1063F}
}