Columbia subject headings:
Harvard subject headings:
Korean letters--History and criticism.
Kwak family--Correspondence.
Kwak, Chu, 1569-1617--Correspondence.
Princeton subject headings:
Korea--Intellectual life--17th century.
Korea--Social life and cutoms--17th century.
Kwak family--Correspondence.
Kwak, Chu, 1569-1617--Correspondence.