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