@misc{indiciaeb4a7631a9af2,
  title = {Relationships between 222Rn dissolved in ground water supplies and indoor 222Rn concentrations in some Colorado front range houses},
  author = {P. F. Folger and P. Nyberg and R. B. Wanty and E. Poeter},
  year = {1994},
  url = {https://pubs.usgs.gov/publication/70017931},
  note = {Source identifier: 70017931}
}