Nizar Faeq Saleh, Omar Abdullah Hussein, Murad Ahmed Yass, Ibrahim Faisal Khalaf. The effect of the use of written and verbal feedback on the achievement level of long jump efficiency. ms [Internet]. 2019 Jun. 30 [cited 2024 Dec. 20];18(2):185-94. Available from: https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1539