Columbia subject headings:
Imams (Shiites)--Biography.
Mahdī, Muḥammad ibn al-Ḥasan, 869-
Shīʻah--History.
Harvard subject headings:
Imams (Shiites)--Biography
Mahdī, Muḥammad ibn al-Ḥasan, 869-
Shīʻah--History
Princeton subject headings: