@misc{indiciaeeab48c682fe3,
  title = {Radium mobility and the age of groundwater in public-drinking-water supplies from the Cambrian-Ordovician aquifer system, north-central USA},
  author = {Paul E. Stackelberg and Zoltan Szabo and Bryant C. Jurgens},
  year = {2018},
  doi = {10.1016/j.apgeochem.2017.11.002},
  url = {https://pubs.usgs.gov/publication/70196116},
  note = {Source identifier: 70196116}
}