@misc{indiciae42932fbf96ff,
  title = {Trace elements and radon in groundwater across the United States, 1992-2003},
  author = {Joseph D. Ayotte and Jo Ann M. Gronberg and Lori E. Apodaca},
  year = {2011},
  doi = {10.3133/sir20115059},
  url = {https://pubs.usgs.gov/publication/sir20115059},
  note = {Source identifier: sir20115059}
}