@misc{indiciae9def755e0d79,
  title = {Radium distribution map and radon potential in the Bonneville Power Administration service area},
  author = {Joseph S. Duval and James K. Otton and W. J. Jones},
  year = {1989},
  doi = {10.3133/ofr89340},
  url = {https://pubs.usgs.gov/publication/ofr89340},
  note = {Source identifier: ofr89340}
}