00613naa#a2200169#i#450# EN\\bibl\92951 20260313170428.5 1994-5655 20241226b2024####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" 2024 4 с. Journal article local Историческая демография. 314.148 Tkachev V. N. ras.editorum.ru