Columbia subject headings:
Harvard subject headings:
Russia--Church history.
Theologians--Russia--Biography.
Theologians--Soviet Union--Biography.
Princeton subject headings:
Russia--Church history.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Clergy.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History.