Columbia subject headings:
Chŏng, Yag-yong, 1762-1836--Periodicals.
Periodicals.
Harvard subject headings:
Chŏng, Yag-yong, 1762-1836--Periodicals.
Princeton subject headings:
Chŏng, Yag-yong, 1762-1836--Periodicals.
Periodicals.