Columbia subject headings:
Harvard subject headings:
Chŏng, Yag-yong, 1762-1836
Chŏng, Yag-yong, 1762-1836--Bibliography.
Korea--History--1637-1864.
Princeton subject headings:
Chŏng, Yag-yong, 1762-1836--Bibliography.
Chŏng, Yag-yong, 1762-1836.
Korea--History--1637-1864.