Columbia subject headings:
Harvard subject headings:
Debates and debating--Congresses.
Greek literature--History and criticism--Congresses
Islamic philosophy--Congresses.
Philosophy, Ancient--Congresses
Princeton subject headings:
City-states--Greece--History--To 1500--Congresses.
Democracy--Greece--History--To 1500--Congresses.
Democracy--Philosophy--Congresses.
Greece--Politics and government--To 146 B.C.--Congresses.
Philosophy, Ancient--Political aspects--Congresses.
Political science--Philosophy--Congresses.