Columbia subject headings:
Harvard subject headings:
Hong Kong (China)--Commerce--History--19th century.
Hong Kong (China)--Foreign economic relations.
Merchants, Foreign--China--Hong Kong--History--19th century.
Trading companies--China--Hong Kong--History--19th century.
Princeton subject headings:
Hong Kong (China)--Commerce--History--19th century.
Hong Kong (China)--Foreign economic relations.
Merchants, Foreign--China--Hong Kong--History--19th century.
Trading companies--China--Hong Kong--History--19th century.