توفيق حامد اح, فالح محمد الساعدي أي. Effect of Kagan’s Structures in the Achievement For Fourth Preparatory Students In Biology Subject. JIR [Internet]. 2022 Aug. 30 [cited 2024 Jul. 3];15(32):27-40. Available from: https://iru.uomustansiriyah.edu.iq/index.php/intel/article/view/348