Columbia subject headings:
Harvard subject headings:
Dictatorship--Portugal--History--20th century.
Dictatorship--Spain--History--20th century.
Portugal--History--Revolution, 1926.
Spain--History--Revolution, 1931.
Princeton subject headings:
Dictatorship--Portugal--History--20th century.
Dictatorship--Spain--History--20th century.
Portugal--History--Revolution, 1926.
Spain--History--Revolution, 1931.