Jabbar Hamid Ahmed, Abdul. “The Educational and Service Apparatus in the Schools of Iraq in the Abbasid Era”. Adab Al-Rafidayn 31, no. 34 (July 1, 2001): 152–194. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/radab/article/view/33217.