Natural radioactivity, building materials, building manufacts, radon, indoor air quality
natural radioactivity, 220Rn, exhalation rate, building materials, interlaboratory comparison
radon transport, radon exhalation, building materials, Natural radioactivity, indoor air
natural radioactivity, national survey, urban environments, outdoor gamma radiation, environmental risk assessment
Indoor radon, national survey, survey design, representativeness
Drinking water, natural radioactivity, gross alpha activity concentration, gross beta activity concentration
Gamma dose rate indoors, building materials, radiation protection, novel tool, dose assessment