title: Working levels of radon daughters in air determined from measurements of RaB plus RaC.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis*; D000512:Alpha Particles; D001729:Bismuth / Q000032:analysis*; D003252:Construction Materials; D004583:Electrons; D007854:Lead / Q000032:analysis*; D008906:Mining; D011868:Radioisotopes / Q000032:analysis*; D014501:Uranium
chemical_list: D011868:Radioisotopes; D007854:Lead; D014501:Uranium; D001729:Bismuth