Columbia subject headings:
Harvard subject headings:
China--Nobility--History.
China--Politics and government--220-589.
China--Politics and government--581-907
China--Social conditions--221 B.C.-960 A.D.
Law--China--History
Princeton subject headings:
China--Nobility--History.
China--Politics and government--581-907.
China--Social conditions--221 B.C.-960 A.D.
Law--China--History and criticism.