Columbia subject headings:
Korea--Civilization--935-1392.
Korea--Foreign relations--935-1392.
Korea--History--Koryŏ period, 935-1392.
Harvard subject headings:
Korea--Civilization--935-1392
Korea--Foreign relations--935-1392
Korea--History--Koryŏ period, 935-1392
Princeton subject headings:
Korea--Civilization--935-1392.
Korea--Foreign relations--935-1392.
Korea--History--Koryŏ period, 935-1392.