Columbia subject headings:
Democracy--Congresses.
Europe--Politics and government--1945---Congresses.
North America--Politics and government--Congresses.
Radicalism--Congresses.
Harvard subject headings:
Democracy--Congresses
Europe--Politics and government--1945---Congresses.
North America--Politics and government--Congresses.
Radicalism--Congresses
Princeton subject headings:
Democracy--Congresses.
Europe--Politics and government--1945---Congresses.
North America--Politics and government--Congresses.
Radicalism--Congresses.