ناصر ع, حويجة ب, ابو بالا ر. Analytical Study to Calculate the Seismic Forces Modification Coefficient R for the Existing RC Dual Structural Systems. Tuj-eng [Internet]. 2020Dec.2 [cited 2024Apr.19];42(5). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/10065