Columbia subject headings:
Harvard subject headings:
Korea--Commercial policy--History--18th century.
Korea--Commercial policy--History--19th century.
Markets--Korea--History--18th century.
Markets--Korea--History--19th century.
Merchants--Korea--History--18th century.
Merchants--Korea--History--19th century.
Princeton subject headings:
Korea--Commercial policy--History--18th century.
Korea--Commercial policy--History--19th century.
Markets--Korea--History--18th century.
Markets--Korea--History--19th century.
Merchants--Korea--History--18th century.
Merchants--Korea--History--19th century.