Columbia subject headings:
China--Civilization--221 B.C.-960 A.D.
China--History--Sui dynasty, 581-618.
China--History--Tang dynasty, 618-907.
Informational works.
Sogdians--China--History.
Harvard subject headings:
China--History--960-1644
Sogdians--China--Social conditions.
Princeton subject headings:
China--Civilization--221 B.C.-960 A.D.
China--History--Sui dynasty, 581-618.
China--History--Tang dynasty, 618-907.
Informational works.
Sogdians--China--History.