Columbia subject headings:
Harvard subject headings:
Labor unions--Political activity--Portugal--History--20th century.
Nunes, Américo.
Portugal--History--Revolution, 1974.
Portugal--Politics and government--1933-1974.
Princeton subject headings:
Labor unions--Political activity--Portugal--History--20th century.
Nunes, Américo.
Portugal--History--Revolution, 1974.
Portugal--Politics and government--1933-1974.