Isaac, U.C., Adeolu, A.I., Ukwu, H.O., Nwankwo, C.A., Obike, O.M. and Ibe, S. 2021. Heritability of semen quality traits of crossbred Isa Brown and Nigerian indigenous cocks. Global Journal of Animal Scientific Research. 9, 2 (Oct. 2021), 65-81.