Columbia subject headings:
Democracy--Study and teaching--Congresses.
Political parties--History--21st century--Congresses.
Harvard subject headings:
Citizenship--Study and teaching
Democracy--Study and teaching
Political parties--Germany--History--21st century.
Political parties--History--21st century.
Princeton subject headings:
Democracy--Study and teaching--Congresses.
Political parties--History--21st century--Congresses.