آل صافي ن. Nasir Al-Din Al-Tusi and the Fall of Baghdad in the Hands of the Mongols in the Year (656 AH 1258 AD) a Historical and Analytical Vision. Kufa_art 2014, 1 (19), 325-342. https://doi.org/10.36317/kaj/2014/v1.i19.6412.