Columbia subject headings:
Harvard subject headings:
Civilization, Classical--Congresses
Greece--Civilization--To 146 B.C.--Congresses.
Rome--Civilization--265 B.C.-30 B.C--Congresses.
Princeton subject headings:
Civilization, Classical--Congresses.
Greece--Civilization--To 146 B.C.--Congresses.
Rome--Civilization--265-30 B.C--Congresses.