Sehen K. The Contribution of Leadership Vigilance to the Implementation of Functional Tasks by Administrators of Local Volleyball Championships. jope [انترنت]. 28 سبتمبر، 2025 [وثق 5 أكتوبر، 2025];37(3):974-88. موجود في: https://jcope.uobaghdad.edu.iq/index.php/jcope/article/view/2359