Columbia subject headings:
Harvard subject headings:
Portugal--History, Military--20th century.
Portugal. Exército--Artillery--History.
World War, 1914-1918--Artillery operations, Portuguese.
World War, 1914-1918--Campaigns--Africa
World War, 1914-1918--Campaigns--France
World War, 1914-1918--Naval operations, Portuguese.
World War, 1914-1918--Regimental histories--Portugal.
Princeton subject headings:
Portugal--History, Military--20th century.
Portugal. Exército--Artillery--History.
World War, 1914-1918--Artillery operations, Portuguese.
World War, 1914-1918--Campaigns--Africa.
World War, 1914-1918--Campaigns--France.
World War, 1914-1918--Naval operations, Portuguese.
World War, 1914-1918--Regimental histories--Portugal.