Columbia subject headings:
Adriatic Sea--Commerce.
France--Commerce--Italy--Naples (Kingdom)
Naples (Kingdom)--Commerce--France.
Naples (Kingdom)--Commerce.
Harvard subject headings:
Adriatic Sea--Commerce.
France--Commerce--Italy--Naples (Kingdom)
Naples (Kingdom)--Commerce--France.
Naples (Kingdom)--Commerce.
Princeton subject headings:
Adriatic Sea--Commerce.
France--Commerce--Naples (Kingdom).
Naples (Kingdom)--Commerce--France.
Naples (Kingdom)--Commerce.