@misc{indiciae5095c57301ee,
  title = {Distribution of indoor radon concentrations in Pennsylvania, 1990-2007},
  author = {Eliza L. Gross},
  year = {2013},
  doi = {10.3133/sir20135143},
  url = {https://pubs.usgs.gov/publication/sir20135143},
  note = {Source identifier: sir20135143}
}