Columbia subject headings:
European Parliament--Elections--History--20th century--Congresses.
European Parliament--Elections--History--21st century--Congresses.
European Union countries--Politics and government--Congresses.
Harvard subject headings:
European Parliament--Elections--History--20th century--Congresses.
European Parliament--Elections--History--21st century--Congresses.
European Union countries--Politics and government--Congresses.
Princeton subject headings: