Columbia subject headings:
Harvard subject headings:
Commerce--History--Medieval, 500-1500--Sources
Customs administration--Italy--Rome--Accounting.
Customs administration--Italy--Rome--History--Sources.
Martin V, Pope, 1368-1431.
Rome (Italy)--Commerce--History--Sources.
Princeton subject headings:
Catholic Church. Camera Apostolica
Rome (Italy)--Commerce--History--Sources.
Tariff--Italy--Rome--History--Sources.