TY JOUR TI Leonid Rybakovsky’s theoretical contribution to the development of Northern demography KW Northern demography KW Leonid Leonidovich Rybakovsky KW population formation KW migration KW colonization KW scientific personnel JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Fauzer, V.V. PY 2025 IS PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"