@misc{indiciae6b5961a3dc3f,
  title = {Alteration of sandstone as a guide to uranium deposits and their origin, northern Black Hills, South Dakota},
  author = {R.C. Vickers},
  year = {1956},
  doi = {10.3133/tem568},
  url = {https://pubs.usgs.gov/publication/tem568},
  note = {Source identifier: tem568}
}