@misc{indiciaebbb231e3e85a,
  title = {Contribution of 222Rn in domestic water supplies to 222Rn in indoor air in Colorado homes},
  author = {E.P. Lawrence and R. B. Wanty and P. Nyberg},
  year = {1992},
  url = {https://pubs.usgs.gov/publication/70016727},
  note = {Source identifier: 70016727}
}