Michel, Jacqueline, and Jordana, M.J., 1987, Nationwide distribution of Ra-228, Ra-226, Rn-222, and U in groundwater, in Graves, Barbara, ed., Radon, radium and other radioactivity in ground water - Hydrogeologic impact and application to indoor airborne contamination: Lewis Publishers, p. 227-240.
Lewis Publishers, p. 227-240.
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Water Resources, Groundwater, Radon, Hazard, Radiometric Survey,