Kadhim, S. et al. 2013. 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. Journal of Physical Education. 25, 1 (Mar. 2013), 88–117. DOI:https://doi.org/10.37359/JOPE.V25(1)2013.598.