Columbia subject headings:
Church and state--Communist countries.
Civil rights.
Freedom of religion--Europe, Eastern.
Freedom of religion--Soviet Union.
Harvard subject headings:
Church and state--Communist countries--History--20th century--Congresses.
Civil rights--Communist countries--Congresses.
Civil rights--Religious aspects--Christianity--Congresses.
Communism and Christianity--Congresses.
Communist countries--Church history--Congresses.
Freedom of religion--Communist countries--Congresses.
Persecution--Communist countries--History--Congresses.
Princeton subject headings: