1. Standard methods for the examination of water and wastewater;APHA, AWWA, WPCF,1976
2. Sanitary landfill leachates and their treatment;Chian,1976
3. Quality and quantity of sanitary leachates;Ehrig;Waste Mgmt Res.,1983
4. Treatment of sanitary landfill leachate: biological treatment;Ehrig;Waste Mgmt Res.,1984
5. Physicochemical treatment in Sanitary landfilling;Ehrig,1989