title: Time variation of 222Rn progeny concentration in rainwater.
mesh_terms: D001729:Bismuth / Q000032:analysis*; D007854:Lead / Q000032:analysis*; D011059:Polonium / Q000032:analysis*; D011847:Radioactive Fallout / Q000032:analysis; D017687:Radon Daughters; D011891:Rain; D012621:Seasons; D014867:Water / Q000032:analysis; D014887:Weather
chemical_list: D011847:Radioactive Fallout; D017687:Radon Daughters; D014867:Water; D007854:Lead; D011059:Polonium; D001729:Bismuth