Columbia subject headings:
Communism--China.
Communism--Cuba.
Communism--Soviet Union.
Communist state--Case studies.
Legitimacy of governments--Case studies.
Harvard subject headings:
Communism--China
Communism--Cuba
Communism--Soviet Union
Communist state--Case studies.
Legitimacy of governments--Case studies.
Princeton subject headings:
Communism--China.
Communism--Cuba.
Communism--Soviet Union.
Communist state--Case studies.
Legitimacy of governments--Case studies.