Columbia subject headings:
Portugal--Social conditions--20th century.
Portugal--Social policy.
Public welfare--Portugal--History--20th century.
Harvard subject headings:
Portugal--Social conditions--20th century.
Portugal--Social policy.
Public welfare--Portugal--History--20th century.
Princeton subject headings:
Portugal--Social conditions--20th century.
Portugal--Social policy.
Public welfare--Portugal--History--20th century.