Columbia subject headings:
Korea--History--Chosŏn dynasty, 1392-1910.
Korea--History--Koryŏ period, 935-1392.
Harvard subject headings:
Korea--History--Chosŏn dynasty, 1392-1910.
Korea--History--Koryŏ period, 935-1392.
Princeton subject headings:
Korea--History--Chosŏn dynasty, 1392-1910.
Korea--History--Koryŏ period, 935-1392.