Columbia subject headings:
Authoritarianism--History--20th century.
Communism--Soviet Union--History--20th century.
Communist International.
Fascism--Italy--History--20th century.
National socialism--History.
Harvard subject headings:
Authoritarianism--History--20th century.
Communism--Soviet Union--History
Communist International
Fascism--Italy--History--20th century
Germany--Relations--Soviet Union.
National socialism.
Princeton subject headings:
Authoritarianism--History--20th century.
Communism--Soviet Union--History--20th century.
Communist International.
Fascism--Italy--History--20th century.
National socialism--History.