I.C. Okoli, D.A. Alaehie, E.C.Akanno, C.G. Okoli, M.N. Opara, M.C. Uchegbu, U.E. Ogundu and F.C. Iheukwumer
International Journal of Poultry Science 3 ( 6 ): 427 - 431 , 2004