Columbia subject headings:
Portugal--Economic conditions--1918-1974.
Portugal--History--1910-1974.
Portugal--Social conditions.
World War, 1939-1945--Portugal.
Harvard subject headings:
Princeton subject headings:
Portugal--Economic conditions--1918-1974.
Portugal--History--1910-1974.
Portugal--Social conditions.
World War, 1939-1945--Portugal.