Columbia subject headings:
Harvard subject headings:
China--History--Song dynasty, 960-1279--Anecdotes.
China--History--Song dynasty, 960-1279--Errors, inventions, etc.
Princeton subject headings:
China--History--Song dynasty, 960-1279--Anecdotes, facetiae, satire, etc.
China--History--Song dynasty, 960-1279--Errors, inventions, etc.