C.O. Edeogu, F.C. Ezeonu, A.N.C. Okaka, C.E. Ekuma and S.O. EIom
Journal of Applied Sciences 7 ( 16 ): 2293 - 2299 , 2007
C.O. Edeogu, F.C. Ezeonu, A.N.C. Okaka, S.O. EIom and C.E. Ekuma
Research Journal of Environmental Sciences 1 ( 4 ): 141 - 150 , 2007