Khairulla M, Abdul Ilah M. The Effect of A Proposed Apparatus for Developing Motor Speed in Volleyball Players. jope [Internet]. 2021 Jun. 28 [cited 2026 Jul. 3];33(2):1-8. Available from: https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1136