Columbia subject headings:
Harvard subject headings:
Asan-gun (Korea)--History.
Chʻŏngyang-ŭp (Korea)--History.
Kongju-gun (Korea)--History.
Korea--History--Chosŏn dynasty, 1392-1910.
Princeton subject headings:
Asan-gun (Korea)--History.
Chʻŏngyang-ŭp (Korea)--History.
Kongju-gun (Korea)--History.
Korea--History--Chosŏn dynasty, 1392-1910.