Columbia subject headings:
Harvard subject headings:
Constitutional law--European Union countries--Congresses
Europe--Economic conditions--1945---Congresses.
Europe--Politics and government--1989---Congresses.
Europe--Social conditions--21st century--Congresses.
European Union
European Union countries--Politics and government.
European Union--Constitution.
Princeton subject headings:
Europe--Economic conditions--1945---Congresses.
Europe--Politics and government--1989---Congresses.
Europe--Social conditions--21st century--Congresses.