1. Assessment of the water quality of the Oti river in Ghana. West Afr;Abdul-Razak;J. Appl. Ecol.,2009
2. Country Environmental Profile for Malawi;Agrifor Consult,2006
3. Effect of tapering on the performance of waste stabilization ponds;Agunwamba;Water Res.,2001
4. Water Quality Criteria for Freshwater Fish. – 297;Alabaster,1980
5. Official Methods of Analysis,2002