Columbia subject headings:
Harvard subject headings:
China--Foreign relations--1644-1912--Sources.
China--Foreign relations--Japan--Ryukyu Islands--Sources.
Ryukyu Islands--Foreign relations--China--Sources.
Princeton subject headings:
China--Foreign relations--1644-1912--Sources.
China--Foreign relations--Japan--Ryukyu Islands--Sources.
Ryukyu Islands--Foreign relations--China--Sources.