Taha Yassin Taha Yassin R. Research title "Assessment of Management Performance of Nineveh primary school principals from the Physical Education teachers in light of the Corona Pandemic ". BERJ [Internet]. 2022 Jun. 1 [cited 2025 Oct. 26];18(2):891-917. Available from: https://moss.uomosul.edu.iq/index.php/berj/article/view/38803