Columbia subject headings:
Borderlands--China--History.
Borderlands--Korea--History.
China--Foreign relations--Korea--History.
Ginseng.
Korea--Foreign relations--1392-1910.
Korea--Foreign relations--China--History.
Harvard subject headings:
Borderlands--China--History.
Borderlands--Korea--History.
China--Foreign relations--Korea--History.
Ginseng.
Korea--Foreign relations--1392-1910.
Korea--Foreign relations--China--History.
Princeton subject headings:
China--Foreign relations--Korea.
Korea--Foreign relations--China.