@misc{indiciae474a525518b4,
  title = {Uranium and thorium in the middle Precambrian Estes Conglomerate, Nemo District, Lawrence County, South Dakota: a preliminary report},
  author = {F. Allan Hills},
  year = {1977},
  doi = {10.3133/ofr7755},
  url = {https://pubs.usgs.gov/publication/ofr7755},
  note = {Source identifier: ofr7755}
}