Columbia subject headings:
Chŏlla-namdo (Korea)--Relations--East Asia.
East Asia--Relations--Korea (South)--Chŏlla-namdo.
Korea--Foreign relations--To 935.
Seafaring life--Korea (South)--Chŏlla-namdo.
Harvard subject headings:
Chang, Po-go, -846
Chŏlla-namdo (Korea)--Antiquities.
Chŏlla-namdo (Korea)--Civilization.
East Asia--Relations--Korea.
Korea--Civilization--To 935.
Korea--Relations--East Asia.
Merchant marine--Korea--History.
Silla (Kingdom)--Commerce--History.
Princeton subject headings: