Columbia subject headings:
Harvard subject headings:
China--History--Han dynasty, 202 B.C.-220 A.D.
China--History--Qin dynasty, 221 B.C.-207 B.C.
China--History--Sui dynasty, 581-618
China--History--Tʻang dynasty, 618-907.
Draft--China--History.
Princeton subject headings:
China--History--Han dynasty, 202 B.C.-220 A.D.
China--History--Qin dynasty, 221-207 B.C.
China--History--Sui dynasty, 581-618.
China--History--Tang dynasty, 618-907.
Draft--China--History.