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Environmental Research Journal 2 ( 2 ): 88 - 98 , 2008
Z.O. Opafunso, B.O. Adewuyi, G.O. Oniyide and E.O. Ifelola
Journal of Engineering and Applied Sciences 3 ( 5 ): 377 - 384 , 2008
Z.O. Opafunso, I.I. Ozigi and G.O. Oniyide
Online Journal of Earth Sciences 2 ( 1 ): 9 - 15 , 2008