1. Acra, A., Jurdi, M., Mu’llallem, H., Karahagopian, Y., Raffoul, Z., 1989. Water Disinfection by Solar Radiation—Assessment and Application. Technical Study 66e, IDRC
2. Standard Methods for the Examination of Water and Wastewater;APHA,1999
3. Manual of Environmental Microbiology;ASM,1997
4. Chemically enhanced sunlight for killing bacteria;Block;J. Solar Energy Eng.,1997
5. Environmental Health Engineering in the Tropics: An Introductory Text;Cairncross,1993