Columbia subject headings:
Korean language--Alphabet.
Language policy--Korea--History.
Sejong, King of Korea, 1397-1450.
Harvard subject headings:
Korean language--Alphabet
Language policy--Korea--History.
Sejong, King of Korea, 1397-1450
Princeton subject headings:
Korean language--Alphabet.
Korean language--Chosŏn dynasty, 1392-1910.
Sejong, King of Korea, 1397-1450. Hunmin chŏngŭm.