Columbia subject headings:
China--Description and travel.
China--Foreign relations--Korea.
Diplomatic and consular service, Korean--China--History.
Diplomatic and consular service, Korean--Japan--History.
Japan--Foreign relations--Korea.
Korea--Foreign relations--China.
Korea--Foreign relations--Japan.
Harvard subject headings:
China--Description and travel.
China--Foreign relations--Korea.
Diplomatic and consular service--Japan--History.
Japan--Foreign relations--Korea.
Korea--Foreign relations--China.
Korea--Foreign relations--Japan.
Princeton subject headings:
China--Description and travel.
China--Foreign relations--Korea.
Diplomatic and consular service--Japan--History.
Japan--Foreign relations--Korea.
Korea--Foreign relations--China.
Korea--Foreign relations--Japan.