Columbia subject headings:
Portugal--Armed Forces--Political activity--History--20th century.
Portugal--Politics and government--20th century.
Sociology, Military--Portugal--History--20th century.
Harvard subject headings:
Portugal--Armed Forces--Political activity.
Sociology, Military--Portugal--History--20th century.
Princeton subject headings:
Portugal--Armed Forces--Political activity.
Sociology, Military--Portugal--History--20th century.