Columbia subject headings:
Harvard subject headings:
Hamgyŏng-bukto (Korea)--Commerce--History.
Hamgyŏng-namdo (Korea)--Commerce--History.
Korea--Commerce--History--18th century.
Korea--Economic conditions--1864-1910.
Princeton subject headings:
Hamgyŏng-bukto (Korea)--Commerce--History.
Hamgyŏng-namdo (Korea)--Commerce--History.
Korea--Commerce--History--18th century.
Korea--Economic conditions--1864-1910.