Aswar Baghdad wa-tahsinatuha al-difa'iyah, Badgdad al-Mudawwarah/ Dar al-Salam, al-kitab al-awwal, min 143 H. tarikh al-istitla' li-tahdid mawqi' al-madinah wa-tasamimiha li-ghayat 218 H. intiqal al-khilafah ila Samarra' wa-tahaddum al-aswar bi-sabab al-f