Columbia subject headings:
Communist countries--Church history--20th century.
Europe, Eastern--Church history--20th century.
Persecution--Communist countries--History--20th century.
Persecution--Europe, Eastern--History--20th century.
Harvard subject headings:
Princeton subject headings:
Freedom of religion--Soviet Union.
Human rights--Soviet Union.
Soviet Union--Foreign relations--United States.
United States--Foreign relations--Soviet Union.