title: A method for determining concentrations of 220Rn in the field.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D008433:Mathematics; D011834:Radiation Monitoring / Q000379:methods*; D011886:Radon / Q000032:analysis*; D013997:Time Factors
chemical_list: D011886:Radon