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International Journal of Poultry Science 5 ( 2 ): 112 - 120 , 2006
P. W. Waldroup, C. A. Fritts, C. A. Keen and F. Yan
International Journal of Poultry Science 4 ( 12 ): 920 - 937 , 2005
P. W. Waldroup, E. O. Oviedo- Rondon and C. A. Fritts
International Journal of Poultry Science 5 ( 11 ): 1016 - 1022 , 2006