Columbia subject headings:
Harvard subject headings:
Customs administration--Italy--Rome--History.
Esch, Arnold--Bibliography.
Imports--Italy--Rome--History.
Rome (Italy)--Commerce--History.
Rome (Italy)--Economic conditions.
Rome (Italy)--History--1420-1798.
Princeton subject headings:
Customs administration--Italy--Rome--History.
Rome (Italy)--Commerce--History.
Rome (Italy)--Economic conditions.