Columbia subject headings:
Harvard subject headings:
Qu Xian (Sichuan Sheng, China)--Economic conditions.
Qu Xian (Sichuan Sheng, China)--Social conditions.
Princeton subject headings:
Qu Xian (Sichuan Sheng, China)--Economic conditions.
Qu Xian (Sichuan Sheng, China)--Social conditions.