00616naa#a2200169#i#450# EN\\bibl\92951 20250423143608.3 1994-5655 20250207b2025####ek#y0engy0150####ca RU Population dynamics of the Ancient Russian state (late IX – early XIII centuries) Journal article Syktyvkar FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences" 2025 4 с. Journal article local Историческая демография. 314.148 Tkachev V. N. komisc.editorum.ru