Columbia subject headings:
Mediterranean Region--Description and travel--Congresses.
Navigation--Mediterranean Region--History--Congresses.
Travelers' writings--History and criticism--Congresses.
Harvard subject headings:
Mediterranean Region--Description and travel--Congresses.
Navigation--Mediterranean Region--History--Congresses.
Travelers' writings--History and criticism--Congresses.
Princeton subject headings:
Mediterranean Region--Description and travel--Congresses.
Navigation--Mediterranean Region--History--Congresses.
Travelers' writings--History and criticism--Congresses.