Columbia subject headings:
Harvard subject headings:
China--Civilization--221 B.C.-960 A.D.--Encyclopedias.
China--History--Qin dynasty, 221 B.C.-207 B.C.--Encyclopedias.
Princeton subject headings:
China--Civilization--221 B.C.-960 A.D.--Encyclopedias.
China--History--Qin dynasty, 221-207 B.C.--Encyclopedias.
Encyclopedias.