Columbia subject headings:
Harvard subject headings:
Korea--History--Chosŏn dynasty, 1392-1910.
Pʻyŏngwŏn-gun (Korea)--History.
Ŭiju-gun (Korea)--History.
Princeton subject headings:
Korea--History--Chosŏn dynasty, 1392-1910.
Pʻyŏngwŏn-gun (Korea)--History.
Ŭiju-gun (Korea)--History.