Columbia subject headings:
Harvard subject headings:
Depressions--History--Congresses.
Europe--Economic conditions--Congresses.
Europe--Politics and government--Congresses.
Financial crises--Europe--History--Congresses.
Princeton subject headings:
Depressions--History--Congresses.
Europe--Economic conditions--Social aspects--Congresses.
Recessions--Europe--History--Congresses.