Columbia subject headings:
Human settlements--Mediterranean Region--Congresses.
Mediterranean Region--Boundaries--Congresses.
Mediterranean Region--Population--Congresses.
Harvard subject headings:
Human settlements--Mediterranean Region--Congresses.
Mediterranean Region--Boundaries--Congresses.
Mediterranean Region--Population--Congresses.
Princeton subject headings:
Human settlements--Population--Congresses.
Mediterranean Region--Boundaries--Congresses.
Mediterranean Region--Population--Congresses.