Columbia subject headings:
Harvard subject headings:
China--Officials and employees--History.
China--Politics and government--960-1279.
Civil service positions--China--History.
Song shi. Zhi guan zhi.
Princeton subject headings:
China--History--Song dynasty, 960-1279.
China--Officials and employees--History.
Tuotuo, 1313-1355. Song shi. Zhi guan zhi.