Columbia subject headings:
Harvard subject headings:
Equality--Europe--History--Congresses.
Europe--Economic conditions--Congresses.
Europe--Social conditions--Congresses.
Income distribution--Europe--History--Congresses.
Poverty--Europe--History--Congresses.
Rich people--Europe--History--Congresses.
Wealth--Europe--History--Congresses.
Princeton subject headings:
Equality--Europe--History--Congresses.
Europe--Economic conditions--Congresses.
Europe--Social conditions--Congresses.
Income distribution--Europe--History--Congresses.
Poverty--Europe--History--Congresses.
Rich people--Europe--History--Congresses.
Wealth--Europe--History--Congresses.