Columbia subject headings:
Harvard subject headings:
Church and state--Soviet Union--History--Sources.
Orthodox Eastern Church--Soviet Union--History--20th century.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--20th century.
Soviet Union--Church history.
Princeton subject headings:
Orthodox Eastern Church--Soviet Union--History--20th century.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--20th century.
Soviet Union--Church history.