@misc{indiciaeb8b12feb04ed,
  title = {Gold in the Black Hills, South Dakota, and how new deposits might be found},
  author = {James Jennings Norton},
  year = {1974},
  doi = {10.3133/cir699},
  url = {https://pubs.usgs.gov/publication/cir699},
  note = {Source identifier: cir699}
}