Nayef M. Assessment of the level of knowledge of physical education teachers with the requirements of total quality for managing physical education activities from the point of view of school principals. RJSS [Internet]. 2022 Aug. 1 [cited 2025 Oct. 2];25(78):237-50. Available from: https://rsprs.uomosul.edu.iq/index.php/rsprs/article/view/50621