title: An instant Working Level meter based on gas proportional counters for use in uranium mines.
mesh_terms: D006801:Humans; D008906:Mining / Q000295:instrumentation*; D011883:Radium / Q000032:analysis; D011886:Radon / Q000032:analysis; D012588:Scintillation Counting / Q000295:instrumentation*; D014501:Uranium / Q000032:analysis*
chemical_list: D014501:Uranium; D011886:Radon; D011883:Radium