Columbia subject headings:
Harvard subject headings:
Korea--History--Chosŏn dynasty, 1392-1910.
P'yŏngyang (Korea)--History.
Yonggang-gun (Korea)--History.
Princeton subject headings:
Korea--History--Chosŏn dynasty, 1392-1910.
P'yŏngyang (Korea)--History.
Yonggang-gun (Korea)--History.