Columbia subject headings:
Portugal--Economic conditions--21st century.
Portugal--Politics and government--21st century.
Portugal--Social conditions--21st century.
Harvard subject headings:
Portugal--Economic conditions--21st century.
Portugal--Politics and government--21st century.
Portugal--Social conditions--21st century.
Princeton subject headings:
Portugal--Economic conditions--21st century.
Portugal--Politics and government--21st century.
Portugal--Social conditions--21st century.