@misc{indiciae38fad621af09,
  title = {National Geochemical Data Base; National Uranium Resource Evaluation data for the conterminous Western United States},
  author = {J. D. Hoffman and Gregory B. Gunnells and James M. McNeal},
  year = {1991},
  doi = {10.3133/ds1},
  url = {https://pubs.usgs.gov/publication/ds1},
  note = {Source identifier: ds1}
}