Columbia subject headings:
Harvard subject headings:
China--Foreign relations--Korea--Sources.
China--Relations--Japan--Sources.
Japan--Relations--China--Sources.
Korea--Foreign relations--China--Sources.
Korea--History--Japanese Invasions, 1592-1598--Sources.
Princeton subject headings:
China--Foreign relations--Korea--Sources.
China--Relations--Japan--Sources.
Japan--Relations--China--Sources.
Korea--Foreign relations--China--Sources.
Korea--History--Japanese Invasions, 1592-1598--Sources.