@misc{indiciae48dae0acd9da,
  title = {Occurrence and geochemistry of radium in water from principal drinking-water aquifer systems of the United States},
  author = {Z. Szabo and Vincent T. DePaul and J.M. Fischer and T. F. Kraemer and E. Jacobsen},
  year = {2012},
  doi = {10.1016/j.apgeochem.2011.11.002},
  url = {https://pubs.usgs.gov/publication/70032665},
  note = {Source identifier: 70032665}
}