TY JOUR TI Specific activity and features of vertical migration of strontium-90 in the peat bog of the Murmansk region KW peat bog KW physical and chemical properties KW strontium-90 (90Sr) KW vertical migration KW Murmansk region JO Vestnik of geosciences AU Lukoshkova, A.A. AU Yakovlev, E.Y. AU Orlov, A.S. PY 2022 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"