Columbia subject headings:
Civilization, Classical--Congresses.
Classical literature--History and criticism--Congresses.
Peace in literature--Congresses.
Peace--History--Congresses.
Harvard subject headings:
Civilization, Classical--Congresses
Peace--Congresses
Princeton subject headings:
Civilization, Classical--Congresses.
Classical literature--History and criticism--Congresses.
Peace in literature--Congresses.
Peace--History--Congresses.