“Conomic Crises in the Period of Conflict Between AL-Amin and AL-Mamun (193- 218 AH = 809- 833 CE”. Journal of the College of Basic Education 27, no. 110 (April 10, 2022): 791–818. Accessed June 4, 2026. https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/5513.