Columbia subject headings:
China--History--Song dynasty, 960-1279.
China--Politics and government--960-1279.
Civil service--China--History.
Harvard subject headings:
China--History--Song dynasty, 960-1279.
China--Politics and government--960-1279.
Civil service--China--History.
Sung dynasty, 960-1279.
Princeton subject headings:
China--History--Song dynasty, 960-1279.
China--Politics and government--960-1279.
Civil service--China--History.