Columbia subject headings:
Harvard subject headings:
China--Economic conditions--To 1644--Sources.
China--Economic policy--To 1644--Sources.
China--History--Qin dynasty, 221 B.C.-207 B.C.--Sources.
Princeton subject headings:
China--Economic conditions--To 1644--Sources.
China--Economic policy--To 1644--Sources.
China--History--Qin dynasty,221-207 B.C.--Sources.