Columbia subject headings:
Portugal--History--Revolution, 1974--Influence.
Portugal--Politics and government--1933-1974.
Portugal--Politics and government--1974-
Spain--Politics and government--1939-1975.
Harvard subject headings:
Portugal--History--Revolution, 1974--Influence.
Spain--Politics and government--1939-1975.
Princeton subject headings:
Portugal--History--20th century.
Portugal--History--Revolution, 1974--Influence.
Spain--History--20th century.