Columbia subject headings:
Harvard subject headings:
China--History--Tʻang dynasty, 618-907.
China--Social conditions--221 B.C.-960 A.D.
Dalits--China--History.
Princeton subject headings:
China--History--Tang dynasty, 618-907.
China--Social conditions--221 B.C.-960 A.D.
Dalits--China--History.