Radon and thoron daughters in housing.
D000398:Air Pollution, Radioactive / Q000032:analysis*; D001729:Bismuth / Q000032:analysis*; D003252:Construction Materials; D006798:Housing; D007854:Lead / Q000032:analysis*; D009864:Ontario; D011059:Polonium / Q000032:analysis*; D017687:Radon Daughters; D012990:Soil Pollutants, Radioactive
D017687:Radon Daughters; D012990:Soil Pollutants, Radioactive; D007854:Lead; D011059:Polonium; D001729:Bismuth