Columbia subject headings:
Chŏng, To-jŏn, 1342-1398.
Korea--Politics and government--1392-1637.
Neo-Confucianism--Korea.
Harvard subject headings:
Chŏng, To-jŏn, 1342-1398
Korea--Politics and government--1392-1637.
Neo-Confucianism--Korea.
Princeton subject headings:
Chŏng, To-jŏn, 1342-1398.
Korea--Politics and government--1392-1637.
Neo-Confucianism--Korea.