Ahmed Abdel Sattar Abdel Qader. The effect of the effectiveness of exercises with focusing attention on learning the skill of passing from the bottom in volleyball for students of the second stage in the College of Physical Education and Sports Science. Mustansiriyah J. Sports Sc. [Internet]. 2024 Feb. 11 [cited 2025 Apr. 19];4(4):72-8. Available from: https://mjss.uomustansiriyah.edu.iq/index.php/mjss/article/view/139