Columbia subject headings:
Harvard subject headings:
Portugal--Colonies--Africa--History, Military--20th century.
Portugal--History, Military--20th century.
Portugal--Military policy.
World War, 1914-1918--Portugal
Princeton subject headings:
Portugal--Colonies--Africa--History, Military--20th century.
Portugal--History, Military--20th century.
Portugal--Military policy.
World War, 1914-1918--Portugal.