Columbia subject headings:
Harvard subject headings:
Japan--Foreign relations--Korea.
Korea--Foreign relations--1864-1910.
Korea--Foreign relations--Japan.
Korea--Foreign relations--Russia.
Russia--Foreign relations--Korea.
Princeton subject headings:
Japan--Foreign relations--Korea.
Korea--Foreign relations--1864-1910.
Korea--Foreign relations--Japan.
Korea--Foreign relations--Russia.
Korea--History--1864-1910.
Russia--Foreign relations--Korea.