@misc{indiciae657efaed8563,
  title = {Radon in the ground water of Chester County, Pennsylvania},
  author = {Ronald A. Sloto and Lisa A. Senior},
  year = {1998},
  doi = {10.3133/fs12098},
  url = {https://pubs.usgs.gov/publication/fs12098},
  note = {Source identifier: fs12098}
}