Columbia subject headings:
Forças Populares 25 de Abril--History.
Left-wing extremists--Portugal--History--20th century.
Portugal--Politics and government--1974-
Terrorism--Portugal--History--20th century.
Harvard subject headings:
Princeton subject headings:
Forças Populares 25 de Abril--History.
Left-wing extremists--Portugal--History--20th century.
Portugal--Politics and government--1974-
Terrorism--Portugal--History--20th century.