Columbia subject headings:
Harvard subject headings:
European Union countries--Foreign economic relations--Portugal--Statistics.
European Union countries--Foreign economic relations--Portugal.
European Union--Portugal.
Investments, European--Portugal.
Portugal--Economic conditions--1974-
Portugal--Economic conditions--1974---Statistics.
Portugal--Foreign economic relations--European Union countries--Statistics.
Portugal--Foreign economic relations--European Union countries.
Princeton subject headings:
European Union--Portugal--History.
Portugal--Economic conditions--1974-
Portugal--Social conditions--20th century.
Portugal--Social conditions--21st century.