@misc{indiciae9b920f59b40a,
  title = {Geology of the Berne quadrangle, Black Hills, South Dakota},
  author = {J. A. Redden},
  year = {1968},
  doi = {10.3133/pp297f},
  url = {https://pubs.usgs.gov/publication/pp297F},
  note = {Source identifier: pp297F}
}