Kadhim S, Adel O, Saady S. The effect of using some of the tools and training aids in improving the performance level of some physical abilities and skills of volleyball players for juniors, ages 13-14 years. jope [Internet]. 2013 Mar. 28 [cited 2024 May 12];25(1):88-117. Available from: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/598