1. Country Tables 1993;Economic and Social Policy Department,1993
2. Irrigation Districts in China;Department of Rural Irrigation, Drainage and Soil Conservation,1991
3. Sassanian and early Islamic waler-control and irrigation systems on the Deh Luran Plain, Iran;Neely,1974
4. Tanks in Karnataka: A Historical Perspective;Dikshit,1993
5. Irrigation in the North (c 200 BC–AD 200);Sharma,1983