Hassan, Rasha I.M., Gamal M.M. Mosaad, and Abd Elstar M. Abd-Ellah. “Effect of Feeding Citric Acid on Performance of Broiler Ducks Fed Different Protein Levels”. Journal of Advanced Veterinary Research 6, no. 1 (January 14, 2016): 18-26. Accessed June 12, 2024. https://advetresearch.com/index.php/AVR/article/view/33.