Columbia subject headings:
Church and state--Soviet Union--History.
Church and state--Soviet Union.
Communism--Soviet Union.
Soviet Union--Church history.
Harvard subject headings:
Church and state--Soviet Union--History
Communism--Soviet Union
Soviet Union--Church history.
Princeton subject headings:
Church and state--Soviet Union--History.
Communism--Soviet Union.
Soviet Union--Church history--1917-.