1. Adekunle, I. M., Adetunji, M. T., Gbadebo, A. M., & Banjoko, O. B. (2007). Assessment of groundwater quality in a typical rural settlement in Southwest Nigeria. International Journal of Environment Resources and Public Health, 4(4), 307–318.
2. Adeniyi, O. D., & Odigure, J. O. (2005). Water quality monitoring: A case study of water pollution in Minna and its environs in Nigeria. Botswana Journal of Technology, 14, 1–5.
3. Aguwamba, J. C. (2003). Optimization of solid waste collection system in Onitcha. Nigeria. Journal of Environmental Issues., 1(1), 124–135.
4. APHA, Awwa and WPCI,. (1998). Standard methods for examination of water and waste waters. Amer. Public Health Assoc. Washington D. C.
5. Ayatomuno, J. M., & Gobo, A. E. (2004). Municipal solid waste management in Portharcourt; Nigeria. Obstacles and prospects. Management of Environmental Quality, 15, 389–398.