Columbia subject headings:
Harvard subject headings:
Church and state--Russia--History--20th century
Russia--Church history.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.
Princeton subject headings:
Church and state--Russia--History--20th century.
Russia--Church history.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.