Columbia subject headings:
China--Commerce--Foreign countries--History.
East Asia--Commerce--History.
Japan--Commerce--Foreign countries--History.
Korea--Commerce--Foreign countries--History.
Harvard subject headings:
China--Commerce--Foreign countries--History.
East Asia--Commerce--History.
Japan--Commerce--Foreign countries--History.
Korea--Commerce--Foreign countries--History.
Princeton subject headings:
China--Commerce--Foreign countries--History.
East Asia--Commerce--History.
Japan--Commerce--Foreign countries--History.
Korea--Commerce--Foreign countries--History.