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