Columbia subject headings:
Harvard subject headings:
Culture--Political aspects--Portugal--History--20th century.
Government, Resistance to--Portugal--20th century.
Politics and culture--Portugal--History--20th century.
Social movements--Portugal--History--20th century.
Princeton subject headings:
Government, Resistance to--Portugal--20th century.
Politics and culture--Portugal--History--20th century.
Social movements--Portugal--History--20th century.