Columbia subject headings:
Harvard subject headings:
Germany--History--Unification, 1990--Congresses.
Political culture--Germany (East)--Congresses.
Political culture--Germany (West)--Congresses.
Princeton subject headings:
Germany--History--Unification, 1990--Congresses.
Political culture--Germany (East)--Congresses.
Political culture--Germany (West)--Congresses.