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J.W. Muthomi, P.E. Otieno, G.N. Chemining wa, J.H. Nderitu and J.M. Wagacha
Journal of Biological Sciences 7 ( 7 ): 1163 - 1170 , 2007
P.E. Otieno, J.W. Muthomi, G.N. Chemining`wa and J.H. Nderitu
Journal of Biological Sciences 9 ( 4 ): 326 - 332 , 2009