Columbia subject headings:
Religion and state--Soviet Union.
Soviet Union--Religion.
Harvard subject headings:
Freedom of religion--Soviet Union--History.
Religion and state--Soviet Union--History.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.
Soviet Union--Church history.
Tikhon, Patriarch of Moscow and All Russia, 1865-1925.
Princeton subject headings:
Freedom of religion--Soviet Union--History.
Religion and state--Soviet Union--History.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--20th century.
Soviet Union--Church history.
Tikhon, Patriarch of Moscow and All Russia, 1865-1925.