Columbia subject headings:
Harvard subject headings:
Chŏngjo, King of Korea, 1752-1800--Correspondence.
Korea--Politics and government--1392-1910.
Princeton subject headings:
Chŏngjo, King of Korea, 1752-1800--Correspondence.
Korea--Kings and rulers--Correspondence.
Korea--Politics and government--1637-1864.
Sim, Hwan-ji, 1730-1802--Correspondence.