Columbia subject headings:
Harvard subject headings:
Democracy--Europe--Congresses
Europe--Politics and government--Congresses.
Europe--Social conditions--Congresses.
Political sociology--Congresses
Politics and culture--Europe--Congresses.
Social change--Europe--Congresses.
Princeton subject headings:
Democracy--Europe--Congresses.
Europe--Politics and government--Congresses.
Europe--Social conditions--Congresses.
Political sociology--Congresses.
Politics and culture--Europe--Congresses.
Social change--Europe--Congresses.