3Li Y.H.,W.J.Ni and Y.X.Zhang. Objectives and Tasks for Developing Efficient Water Use Agriculture in China.Proceedings of ICID Conference, Montreal, Canada.2002.
4Nyberg A.and S.Kozelle.Accelerating China’S Rural Transformarion.The World Bank,Washington,USA.1999.
5Brown, L.tL. and B. Halweil.China's Water Shortage Could Shake World Food Security.World Watch,11(4): 10-21.July/August 1998.