Columbia subject headings:
Harvard subject headings:
China--Economic conditions--To 1644.
China--History--Tang dynasty, 618-907.
Liu, Xu, 887-946. Jiu Tang shu
Ouyang, Xiu, 1007-1072. Xin Tang shu.
Princeton subject headings:
China--Economic conditions--To 1644.
Liu, Xu, 887-946. Jiu Tang shu.
Ouyang, Xiu, 1007-1072. Xin Tang shu.