@misc{indiciae4fa520ec1149,
  title = {Occurrences of radioactive materials in the Bald Mountain gold-mining area, northern Black Hills, South Dakota},
  author = {Rollin C. Vickers},
  year = {1954},
  doi = {10.3133/cir351},
  url = {https://pubs.usgs.gov/publication/cir351},
  note = {Source identifier: cir351}
}