G.C. Onuekwusi and L. Okorie Ijeoma
Agricultural Journal 3 ( 2 ): 102 - 106 , 2008
O.O. Ekumankama and G.C. Onuekwusi
Pakistan Journal of Social Sciences 5 ( 1 ): 70 - 75 , 2008
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Research Journal of Applied Sciences 2 ( 2 ): 165 - 169 , 2007