Hawash, Dhbyaa, and Mohamed Halil. “The Effect of Using Teaching Aid on the Development of Straight Forehand and Backhand Shot Performance in Lawn Tennis”. Journal of Physical Education 34, no. 3 (September 28, 2022): 296–304. Accessed July 8, 2026. https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1321.