1. T.C.D. 2003. Recycling of municipal wastes in Agriculture, Irrigation of corn with treated municipal wastewater. National Agriculture Research Foundation. Institute of soil classification and mapping. Congress of recovery, recycling, integration, February 1999 (http://www.environmental-center.com/articles/articles332/article332.htm).
2. J.H.J. Ensink and M.R. Aslam, Use of Untreated Wastewater in Petri-Urban Agriculture in Pakistan Risks and Opportunities, Research report 67, International water management Institute, Colombo, Srilanka.
3. Wastewater qualities and its reuse in agriculture in Saudi Arabia;Ghualm,1999
4. Protected Irrigation;Abdul-Moneim,1985
5. Interesting irrigation water analysis. www: http//algreatlakes.com.