@misc{indiciae1e83a95f89fb,
  title = {Uraniferous coal and carbonaceous shale in northeast Parana, Brazil},
  author = {Donald D. Haynes and Charles T. Pierson},
  year = {1957},
  doi = {10.3133/tem1097},
  url = {https://pubs.usgs.gov/publication/tem1097},
  note = {Source identifier: tem1097}
}