Waugh, E., Dzoma, B., Seabo, D., Aganga, A., Tsopito, C., Omphile, U., Sebolai, B., & Malela, L. (2007). Gross Adaptive Morphologic Changes Occurring in the Gastrointestinal Tract Components of Ostriches Fed Ration Including or Excluding Grit in Botswana. International Journal of Poultry Science, 6(4), 271–275. https://doi.org/10.3923/ijps.2007.271.275