Columbia subject headings:
Harvard subject headings:
Portugal--Foreign relations--United States.
Portugal--History--Coup d'état, 1975.
Portugal--History--Revolution, 1974.
Subversive activities--Portugal.
United States--Foreign relations--Portugal.
United States. Central Intelligence Agency
Princeton subject headings:
Portugal--Foreign relations--United States.
Portugal--History--Revolution, 1974.
Portugal--Politics and government--1974-
United States--Foreign relations--Portugal.
United States. Central Intelligence Agency