Columbia subject headings:
Harvard subject headings:
Hebei Sheng (China)--Economic conditions.
Jiangsu Sheng (China)--Economic conditions.
Shandong Sheng (China)--Economic conditions.
Princeton subject headings:
Hebei Sheng (China)--Economic conditions.
Jiangsu Sheng (China)--Economic conditions.
Shandong Sheng (China)--Economic conditions.