1. Standard Methods for Examination of Water and Wastewater;American Public Health Association (APHA) AWWA and WPCF,1985
2. Water Quality Standards for Wastewater Reuse,1094
3. Characteristics of effluent from gray and black water septic tanks;Brandes;J. Wat. Pollut. Fed.,1978
4. Residential Water Conservation System Design in Tucson, Arizona;Brittain,1983
5. Management of Small Waste Flow;Environmental Protection Agency;EPA-6012,1978