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Journal of Applied Sciences 8 ( 5 ): 895 - 898 , 2008
S.C. Tan, F.M. Abbou and H.T. Ewe
Journal of Applied Sciences 7 ( 23 ): 3796 - 3800 , 2007
S.C. Tan, F.M. Abbou and H.T. Ewe
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