Hassan, Mohammed, and Ahmed Haitham. “The Effect Of Special Exercises On Learning Hurdle Clearing And The Rhythmic Triple Step Of 100m Hurdles Aged 14 – 15 Years Old”. Journal of Physical Education 30, no. 1 (March 28, 2018): 111–131. Accessed May 2, 2024. https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/323.