Title: Sergeĭ Nikolaevich Vvedenskiĭ
Subjects: Bibliography, History, Russkai︠a︡ pravoslavna t︠s︡erkovʹ, Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ
People: Sergeĭ Nikolaevich Vvedenskiĭ (1867-1940)