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  1. Okuku, E.O and Peter, H. K. Choose of Heavy Metals Pollution Biomonitors: A Critic of the Method that uses Sediments total Metals Concentration as the Benchmark. International Journal of Environmental  Reearch., 6(1):313-322,2012
  2. Kiteresi, L.I., Okuku, E.O, Mwangi, S. N, Ohowa, B, Wanjeri, V.O. ,Okumu, S. and Mkono, M. The Influence of Land Based Activities on the Phytoplankton Communities of Shimoni-Vanga system, Kenya. International Journal of Environmental  Reearch.6(1):151-162, 2012.