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International Journal of Poultry Science 5 ( 12 ): 1160 - 1163 , 2006
Pakistan Journal of Nutrition 4 ( 2 ): 64 - 68 , 2005
N. J. Okeudo, B. W. Moss and M. B. Chestnutt
Pakistan Journal of Nutrition 3 ( 2 ): 107 - 111 , 2004