Columbia subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Persecutions--Soviet Union.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--Sources.
Soviet Union--Church history--Sources.
Harvard subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--Sources.
Soviet Union--Church history--Sources.
Princeton subject headings:
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--Sources.
Soviet Union--Church history--Sources.