Columbia subject headings:
Harvard subject headings:
China--History--221 B.C.-960 A.D.--Congresses.
East Asia--History--Congresses.
East Asia--History.
Japan--History--To 645--Congresses.
Korea--History--To 935--Congresses.
Princeton subject headings:
China--History--221 B.C.-960 A.D.--Congresses.
East Asia--History--Congresses.
East Asia--History.
Japan--History--To 645--Congresses.
Korea--History--To 935--Congresses.