Columbia subject headings:
Communism--Soviet Union--History.
Communism--Study and teaching--Soviet Union.
Communism--Textbooks.
Harvard subject headings:
Communism--Soviet Union--History
Communism--Soviet Union--Study and teaching
Communism--Study and teaching--Soviet Union.
Princeton subject headings:
Communism--Soviet Union--History.
Communism--Soviet Union--Study and teaching.