@misc{indiciaea8b2bf90873e,
  title = {Evaluation of radon occurrence in groundwater from 16 geologic units in Pennsylvania, 1986–2015, with application to potential radon exposure from groundwater and indoor air},
  author = {Eliza L. Gross},
  year = {2017},
  doi = {10.3133/sir20175018},
  url = {https://pubs.usgs.gov/publication/sir20175018},
  note = {Source identifier: sir20175018}
}