Hisham R, Gassem W. The effect of skill exercises (individual - collective) according to the type of learning (contemplative - practical) in learning some of the basic skills of volleyball for students of the fifth preparatory. jope [Internet]. 2019 Jun. 28 [cited 2024 May 2];31(2):188-204. Available from: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/933