Columbia subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.
Soviet Union--History--Revolution, 1917-1921.
Soviet Union--Religion.
Harvard subject headings:
Princeton subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.
Soviet Union--History--Revolution, 1917-1921.
Soviet Union--Religion.