“The Effect of Using Systemic Approach in Physics on the Achievement of the 2nd Intermediate Grade Students”. ALUSTATH JOURNAL FOR HUMAN AND SOCIAL SCIENCES 220, no. 2 (November 8, 2018): 221–244. Accessed May 4, 2024. https://alustath.uobaghdad.edu.iq/index.php/UJIRCO/article/view/493.