Rwuaan, J., Rekwot, P., Abdu, P., Eduvie, L., & Obidi, J. (2009). Semen Characteristics of Vaccinated Shikabrown Cocks Challenged with a Velogenic Newcastle Disease Virus. International Journal of Poultry Science, 8(9), 896–901. https://doi.org/10.3923/ijps.2009.896.901