Columbia subject headings:
Harvard subject headings:
Civilization, Ancient--Congresses
Civilization, Oriental--Congresses.
Civilization, Western--Congresses
East and West--Congresses
Hellenism--Congresses
Princeton subject headings:
Civilization, Ancient--Congresses.
Civilization, Oriental--Congresses.
Civilization, Western--Congresses.
East and West--Congresses.
History, Ancient--Congresses.