Columbia subject headings:
Harvard subject headings:
Democracy--Economic aspects--Congresses.
Democracy--History--20th century--Congresses.
Europe--Politics and government--20th century--Congresses.
Political leadership--History--20th century--Congresses.
Political parties--History--20th century--Congresses.
Representative government and representation--Congresses
Princeton subject headings:
Democracy--Economic aspects--Congresses.
Democracy--History--20th century--Congresses.
Europe--Politics and government--20th century--Congresses.
Political leadership--History--20th century--Congresses.
Political parties--History--20th century--Congresses.
Representative government and representation--Congresses.