@misc{indiciae740ec9964633,
  title = {Trace elements reconnaissance in South Dakota and Wyoming : preliminary report},
  author = {A.L. Slaughter and John M. Nelson},
  year = {1946},
  doi = {10.3133/tei20},
  url = {https://pubs.usgs.gov/publication/tei20},
  note = {Source identifier: tei20}
}