Columbia subject headings:
Harvard subject headings:
Communication in politics--Europe--History--Congresses.
Conflict management--Political aspects--Europe--Congresses.
Europe--Politics and government--Congresses.
Princeton subject headings:
Communication in politics--Europe--History--Congresses.
Constitutional history--Europe--Congresses.
Europe--Politics and government--Congresses.
Political culture--Europe--History--Congresses.