Safar Alyas Michael Al-Saffar M, Khalid Saddiq Al-Shaikh-Ali D. Riprap Gradation Effect On Local Scour Around Bridge Piers. AREJ [Internet]. 2008 Feb. 28 [cited 2025 Aug. 7];16(1):56-68. Available from: https://ojs.uomosul.edu.iq/index.php/arej/article/view/27301