TY JOUR TI Method of Non-Destructive Measurement of Natural Radionuclides Concentration in Building Materials KW natural radionuclides KW building materials KW radon study KW radium JO ANRI AU Vasil'ev, A.V. AU Ekidin, A.A. AU Pyshkina, M.D. AU Malinovskiy, G.P. AU Onischenko, A.D. AU Yarmoshenko, I.V. AU Zhukovskiy, M.V. PY 2021 IS 0 PB Scientific-Production Enterprise “Dosa”