Columbia subject headings:
Koguryŏ (Kingdom)--History.
Korea--History--Chosŏn dynasty, 1392-1910.
Korea--History--To 935.
Harvard subject headings:
Koguryŏ (Kingdom)--History.
Korea--History--Chosŏn dynasty, 1392-1910.
Korea--History--To 935.
Princeton subject headings:
Koguryŏ (Kingdom)--History.
Korea--History--Chosŏn dynasty, 1392-1910.
Korea--History--To 935.