Columbia subject headings:
Asia--Commerce--Portugal--History.
China--Commerce--Portugal--History.
Portugal--Commerce--Asia--History.
Portugal--Commerce--China--History.
Harvard subject headings:
Asia--Commerce--Portugal--History.
China--Commerce--Portugal--History.
Portugal--Colonies--Asia--Commerce--History.
Portugal--Commerce--Asia--History.
Portugal--Commerce--China--History.
Princeton subject headings:
Asia--Commerce--Portugal--History.
China--Commerce--Portugal--History.
Portugal--Colonies--Asia--Commerce--History.
Portugal--Commerce--Asia--History.
Portugal--Commerce--China--History.