Columbia subject headings:
Harvard subject headings:
Dictatorship--History.
Greece--Politics and government--1967-1974.
Portugal--Politics and government--1933-1974.
Spain--Politics and government--1939-1975.
Princeton subject headings:
Dictators--Greece.
Dictators--Portugal.
Dictators--Spain.
Dictatorship--Greece.
Dictatorship--Portugal.
Dictatorship--Spain.