Columbia subject headings:
Communication--Mediterranean Region--History--Congresses.
Mediterranean Region--Civilization--Congresses.
Mediterranean Region--History--To 476--Congresses.
Harvard subject headings:
Communication--Mediterranean Region--History--Congresses.
Mediterranean Region--Civilization--Congresses.
Mediterranean Region--History--To 476--Congresses.
Princeton subject headings:
Communication--Mediterranean Region--History--Congresses.
Mediterranean Region--Civilization--Congresses.
Mediterranean Region--History--To 476--Congresses.