Hashm, A., Thamr, A. and Thamr, A. (2017) “Analytical Study of Some of the Biomechanical Variables of the start phase and Their Relation with Achievement of the 50 m Freestyle Swimming In Advance Swimmers”, Journal of Physical Education, 29(4), pp. 86–98. doi:10.37359/JOPE.V29(4)2017.270.