Columbia subject headings:
Europe, Southern--Congresses.
Europe, Southern--History--Congresses.
Harvard subject headings:
Europe, Southern--Historical geography--Congresses.
Europe, Southern--History--Congresses.
Mediterranean Region--Historical geography--Congresses.
Mediterranean Region--History--Congresses.
Princeton subject headings:
Europe, Southern--Congresses.
Europe, Southern--History--Congresses.