Columbia subject headings:
Dictatorship--Europe--History--20th century.
Totalitarianism--Europe--History--20th century.
Harvard subject headings:
Authoritarianism--Europe.
Dictatorship--Europe.
Europe--Politics and government--20th century.
Socialism--Europe
Princeton subject headings:
Authoritarianism--Europe.
Dictatorship--Europe.
Europe--Politics and government--20th century.
Socialism--Europe.