Title: al-Imām al-Mahdī Aḥmad ibn Yaḥyá al-Murtaḍá wa-atharuhu fī al-fikr al-Islāmī siyāsīyan wa-ʻaqāʼidīyan
Subjects: Zaydīs, Motazilites
People: Aḥmad ibn Yaḥyá Ibn al-Murtaḍá (1363-1437)