1. FAO. 2003. World agriculture: Towards 2015/2030: an FAO perspective. Earthscan.
2. Hy-Line Brown Commercial Layer Performance Standards Manual;Hy-Line,2013
3. Profitability comparisons of imported and local strains of commercial layers;Nolan;Rural Industries Research and Development Corporation,2001
4. Performance of Lohmann Tradition in a comparative study of four commercial pullet strains in Nigeria;Okoro,2003
5. Improved Practices in Rearing Indigenous Chickens;CTA,2007