Columbia subject headings:
Irrigation--China--Jiangsu Sheng--History.
Irrigation--China--Zhejiang Sheng--History.
Jiangsu Sheng (China)--Economic conditions.
Jiangsu Sheng (China)--Historical geography.
Zhejiang Sheng (China)--Economic conditions.
Zhejiang Sheng (China)--Historical geography.
Harvard subject headings:
Irrigation--China--Yangtze River Delta--History.
Yangtze River Delta (China)--Historical geography.
Yangtze River Region (China)--Economic conditions--History.
Princeton subject headings: