Columbia subject headings:
Chŏng, Yag-yong, 1762-1836--Knowledge and learning.
Civil service ethics--Korea--History.
Korea--Officials and employees--Conduct of life.
Public administration--Korea--History.
Public administration.
Harvard subject headings:
Chŏng, Yag-yong, 1762-1836--Knowledge--Public administration.
Civil service ethics--Korea--History.
Korea--Officials and employees--Conduct of life.
Public administration--Korea--History.
Princeton subject headings:
Chŏng, Yag-yong, 1762-1836.
Chŏng, Yag-yong, 1762-1836. Hŭmhŭm sinsŏ.
Chŏng, Yag-yong, 1762-1836. Kyŏngse yup'yo.
Chŏng, Yag-yong, 1762-1836. Mongmin simsŏ.
Korea--Politics and government--Philosophy.