title: Long-lived radon daughters as atmospheric radioactive tracers.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis*; D001131:Arkansas; D001729:Bismuth / Q000032:analysis; D007854:Lead / Q000032:analysis; D011059:Polonium / Q000032:analysis; D011868:Radioisotopes / Q000032:analysis
chemical_list: D011868:Radioisotopes; D007854:Lead; D011059:Polonium; D001729:Bismuth