TY JOUR TI Natural movement of the population of the Komi ASSR in 1946-1959 KW natural population movement KW fertility KW mortality KW causes of death KW demographic transition KW Komi Republic JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Lytkina, U.V. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"