@misc{indiciaeb077b6a5c064,
  title = {Uranium and thorium distribution in soils and weathered bedrock in south Texas},
  author = {Kendell A. Dickinson},
  year = {1977},
  doi = {10.3133/ofr77764},
  url = {https://pubs.usgs.gov/publication/ofr77764},
  note = {Source identifier: ofr77764}
}