In Sweden there are two major sources to indoor radon, the building material and radon from uranium rich soils. It is now widely accepted that indoor radon daughter concentration in Sweden, higher than 1000 Bq/m3 is most frequently caused by
Tracing of radon leakages
Year:
1984
Bibliographic info:
Indoor Air, Vol.2, Radon, Passive Smoking, Particulates and Housing Epidemiology edited by B.Berglund, T.Lindvall, J.Sundell. Swedish Council for Building Research, Stockholm, 1984. 125-136, 10 figs, 1 tab, 7 refs. #DATE 00:00:1984 in English AIC bk