@misc{indiciae91e9d730c9a1,
  title = {Lithium anomaly near Pringle, southern Black Hills, South Dakota, possibly caused by unexposed rare-mineral pegmatite},
  author = {James Jennings Norton},
  year = {1984},
  doi = {10.3133/cir889},
  url = {https://pubs.usgs.gov/publication/cir889},
  note = {Source identifier: cir889}
}