Kingori, A., Tuitoek, J., Muiruri, H., & Wachira, A. (2010). Effect of Dietary Crude Protein Levels on Egg Production, Hatchability and Post-Hatch Offspring Performance of Indigenous Chickens. International Journal of Poultry Science, 9(4), 324–329. https://doi.org/10.3923/ijps.2010.324.329