al-Wathāʼiq al-siyāsīyah wa-al-idārīyah al-ʻāʼidah lil-ʻuṣūr al-ʻAbbāsīyah al-mutatābiʻah 247-656 H/861-1258 M : "dirāsah wa-nuṣūṣ" - Ḥamādah, Muḥammad Māhir, (Silsilat wathāʼiq al-Islām ;, 1978)