@misc{indiciaef6ad7d8cd84e,
  title = {Principal thorium resources in the United States},
  author = {Mortimer Hay Staatz and T.J. Armbrustmacher and J. C. Olson and I. K. Brownfield and M. R. Brock and J.F. Lemons and L.V. Coppa and B.V. Clingan},
  year = {1979},
  doi = {10.3133/cir805},
  url = {https://pubs.usgs.gov/publication/cir805},
  note = {Source identifier: cir805}
}