TY - RPRT TI - Principal aquifers can contribute radium to sources of drinking water under certain geochemical conditions AU - Zoltan Szabo AU - Jeffrey M. Fischer AU - Tracy Connell Hancock PY - 2012 DO - 10.3133/fs20103113 UR - https://pubs.usgs.gov/publication/fs20103113 ID - fs20103113 ER -