Columbia subject headings:
Harvard subject headings:
China--History--Xi Xia dynasty, 1038-1227--Sources.
Law--China--Gansu Sheng--Sources.
Law--China--Shaanxi Sheng--Sources.
Tangut (Chinese people)
Princeton subject headings:
China--History--Hsi Hsia dynasty, 1038-1227--Sources.
Law--China--Kansu Province--Sources.
Law--China--Shensi Province--Sources.
Tangut (Chinese people)