Columbia subject headings:
Harvard subject headings:
Merchants--Italy--Naples (Kingdom)--History.
Naples (Kingdom)--Commerce--History.
Naples (Kingdom)--Economic conditions.
Naples (Kingdom)--Social conditions.
Pressure groups--Italy--Naples (Kingdom)--History.
Princeton subject headings:
Merchants--Italy--Naples (Kingdom)--History.
Naples (Kingdom)--Commerce--History.
Naples (Kingdom)--Economic conditions.
Naples (Kingdom)--Social conditions.
Pressure groups--Italy--Naples (Kingdom)--History.