Columbia subject headings:
Civilization, Classical--Congresses.
Greece--Politics and government--Congresses.
Power (Social sciences)--Congresses.
Rome--Politics and government--Congresses.
Harvard subject headings:
Civilization, Classical--Congresses
Greece--Politics and government--Congresses.
Power (Social sciences)--Congresses
Rome--Politics and government--Congresses.
Princeton subject headings:
Civilization, Classical--Congresses.
Greece--Politics and government--Congresses.
Power (Social sciences)--Congresses.
Rome--Politics and government--Congresses.