Radon daughters in European mines.
D000398:Air Pollution, Radioactive; D001729:Bismuth; D005060:Europe; D007854:Lead; D008452:Maximum Allowable Concentration; D008906:Mining; D011059:Polonium; D017687:Radon Daughters; D014501:Uranium
D017687:Radon Daughters; D007854:Lead; D014501:Uranium; D011059:Polonium; D001729:Bismuth