Columbia subject headings:
Harvard subject headings:
Communication--Italy, Southern--History--Congresses.
Italy, Southern--History--Congresses.
Transportation--Italy, Southern--History--Congresses.
Princeton subject headings:
Communication and culture--Italy, Southern--History--Congresses.
Italy, Southern--Civilization--Congresses.
Italy, Southern--Social life and customs--Congresses.
Normans--Italy, Southern--Congresses.