TY - RPRT TI - Radium mobility and the age of groundwater in public-drinking-water supplies from the Cambrian-Ordovician aquifer system, north-central USA AU - Paul E. Stackelberg AU - Zoltan Szabo AU - Bryant C. Jurgens PY - 2018 DO - 10.1016/j.apgeochem.2017.11.002 UR - https://pubs.usgs.gov/publication/70196116 ID - 70196116 ER -