Columbia subject headings:
Councils and synods--Russia (Federation)--History--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ. Pomestnyĭ sobor.
Harvard subject headings:
Councils and synods--Soviet Union--History--Sources.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Soviet Union--History--Sources.
Soviet Union--Church history--Sources.
Princeton subject headings: