Dr. Abdulzahra Kareem Abbas Al-Sulaimawi, and Dr. Kadhim AbdAlmhsin khalf. “The Effect Of An Educational Curriculum In Developing The Effectiveness Of Defensive Performance For Young Volleyball Players”. Elementary Education Online 21, no. 3 (December 10, 2023): 300–316. Accessed December 22, 2024. https://ilkogretim-online.org/index.php/pub/article/view/178.