conomic crises in the period of conflict between AL-Amin and AL-Mamun (193- 218 AH = 809- 833 CE. cbej [Internet]. 2022 Apr. 10 [cited 2024 Jul. 23];27(110):791-818. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/5513