Columbia subject headings:
Harvard subject headings:
Constitutional law--Europe--Congresses.
Political culture--Europe--Congresses.
Political parties--Europe--Congresses.
Political sociology--Europe--Congresses.
Princeton subject headings:
Democracy--Germany--Congresses.
Parliamentary practice--Germany--Congresses.
Political culture--Germany--Congresses.
Political parties--Germany--Congresses.
Political sociology--Congresses.
Representative government and representation--Congresses.