Columbia subject headings:
Harvard subject headings:
China--History--To 221 B.C.--Anecdotes.
Medicine, Chinese--History--To 221 B.C.--Anecdotes.
Science--China--History
Technology--China--History
Princeton subject headings:
China--History--To 221 B.C.--Anecdotes.
Medicine, Chinese--History--To 221 B.C.--Anecdotes.
Technology--China--History.