@misc{indiciae3a47c041d0b9,
  title = {Indoor radon and its sources in the ground},
  author = {A. B. Tanner},
  year = {1986},
  doi = {10.3133/ofr86222},
  url = {https://pubs.usgs.gov/publication/ofr86222},
  note = {Source identifier: ofr86222}
}