Columbia subject headings:
Chŏng, Yag-yong, 1762-1836--Criticism and interpretation.
Neo-Confucianism--Korea--History.
Philosophy, Korean--18th century.
Harvard subject headings:
Chŏng, Yag-yong, 1762-1836--Criticism and interpretation.
Neo-Confucianism--Korea--History
Philosophy, Korean--18th century
Princeton subject headings:
Chŏng, Yag-yong, 1762-1836--Knowledge and learning.
Chŏng, Yag-yong, 1762-1836--Political and social views.
Chŏng, Yag-yong, 1762-1836.