@misc{indiciae1e14ab1d2048,
  title = {Natural thorium resources and recovery: Options and impacts},
  author = {Timothy Ault and Bradley S. Van Gosen and Steven Krahn and Allen Croff},
  year = {2017},
  doi = {10.13182/nt15-83},
  url = {https://pubs.usgs.gov/publication/70143385},
  note = {Source identifier: 70143385}
}