Columbia subject headings:
China--Economic conditions--To 1644.
China--History--Song dynasty, 960-1279.
Harvard subject headings:
China--Economic conditions--To 1644.
China--History--Song dynasty, 960-1279.
Princeton subject headings:
China--Economic conditions--To 1644.
China--History--Song dynasty, 960-1279.
Sung shih. Shih huo chih.