Gilekson, Robert H.; Perry, Eugene C., Jr.; Cowart, James B.; Holtzman, Richard B.(University of Illinois at Urbana-Champaign. Water Resources Center, 1984-04-01)
Stable and radioactive isotopes in groundwater were studied in an investigation of the natural geologic sources of high concentrations of ²²⁶Ra and ²²⁸Ra in confined aquifers in the Cambrian and Ordovician bedrock of ...