C. Pietsch, S. Oates, J. Hess and W. Berry
International Journal of Poultry Science 7 ( 3 ): 207 - 210 , 2008
L. M. Stevenson, J. B. Hess, S. S. Oates and W. D. Berry
International Journal of Poultry Science 13 ( 3 ): 124 - 132 , 2014