@misc{indiciae4d28d3f1185a,
  title = {Thorium and rare earths in the United States, exclusive of Alaska and Hawaii},
  author = {J. C. Olson and J. W. Adams},
  year = {1962},
  doi = {10.3133/mr28},
  url = {https://pubs.usgs.gov/publication/mr28},
  note = {Source identifier: mr28}
}