Columbia subject headings:
Byzantine Empire--Relations--Italy--Genoa.
Byzantine Empire--Relations--Italy--Pisa.
Byzantine Empire--Relations--Italy--Venice.
Commercial law (Roman law)
Genoa (Italy)--Relations--Byzantine Empire.
Law, Byzantine--History.
Pisa (Italy)--Relations--Byzantine Empire.
Venice (Italy)--Relations--Byzantine Empire.
Harvard subject headings:
Byzantine Empire--History--1081-1453--Sources.
Byzantine Empire--History--527-1081--Sources.
Byzantine Empire--Relations--Italy--Genoa--Sources.
Byzantine Empire--Relations--Italy--Pisa--Sources.
Byzantine Empire--Relations--Italy--Venice--Sources.
Genoa (Italy)--Relations--Byzantine Empire--Sources.
Law, Byzantine--Sources.
Pisa (Italy)--Relations--Italy--Byzantine Empire--Sources.
Venice (Italy)--Relations--Byzantine Empire--Sources.
Princeton subject headings:
Byzantine Empire--Relations--Italy--Genoa.
Byzantine Empire--Relations--Italy--Pisa.
Byzantine Empire--Relations--Italy--Venice.
Genoa (Italy)--Relations--Byzantine Empire.
Law, Byzantine.
Pisa (Italy)--Relations--Byzantine Empire.
Venice (Italy)--Relations--Byzantine Empire.