@misc{indiciaece64a29e91fb,
  title = {Geologic distribution and resources of thorium},
  author = {Jerry Chipman Olson and William C. Overstreet},
  year = {1964},
  doi = {10.3133/b1204},
  url = {https://pubs.usgs.gov/publication/b1204},
  note = {Source identifier: b1204}
}