Columbia subject headings:
Americans--China--Guangzhou Shi--History.
China--Foreign economic relations--United States.
Guangzhou Shi (China)--Commerce--History.
Merchants--China--Guangzhou Shi--History.
United States--Foreign economic relations--China.
Harvard subject headings:
Americans--China--Guangzhou Shi--History.
China--Foreign economic relations--United States.
Guangzhou Shi (China)--Commerce--History.
Merchants--China--Guangzhou Shi--History.
United States--Foreign economic relations--China.
Princeton subject headings: