Columbia subject headings:
Harvard subject headings:
Tongchuan Shi (Shaanxi Sheng, China)--Economic conditions.
Tongchuan Shi (Shaanxi Sheng, China)--Statistics.
Princeton subject headings:
Tongchuan Shi (Shaanxi Sheng, China)--Economic conditions.
Tongchuan Shi (Shaanxi Sheng, China)--Statistics.