Columbia subject headings:
Europe--Politics and government--Congresses.
Peace--History--Congresses.
Political culture--Europe--History--Congresses.
Harvard subject headings:
Europe--Politics and government--Congresses
Peace--History--Congresses.
Political culture--Europe--History--Congresses.
Princeton subject headings:
Europe--Politics and government--Congresses.
Peace--History--Congresses.
Political culture--Europe--History--Congresses.