Columbia subject headings:
Byzantine Empire--Commerce--Italy--Genoa--History.
Genoa (Italy)--Commerce--Byzantine Empire--History.
Harvard subject headings:
Byzantine Empire--Commerce--Italy--Genoa--History.
Genoa (Italy)--Commerce--Byzantine Empire--History.
Princeton subject headings:
Byzantine Empire--Commerce--Italy--Genoa--History.
Genoa (Italy)--Commerce--Byzantine Empire--History.