1. Standard Methods for the Examination of Water and Wastewater;APHA,1980
2. New Fertilizer Material;Araten,1968
3. Tahoe Truckee Sanitation Agency: the first three years;Butterfield;TTSA internal report,1981
4. AWT plants makes wastewater potable;Gunn;Wat. Wastes Engng,1979
5. Ion exchange advanced treatment to remove nutrients from sewage;Liberti,1982