Columbia subject headings:
Harvard subject headings:
Islam--Doctrines
Islamic eschatology.
Mahdi.
Mahdism.
Shīʻah.
Princeton subject headings:
Imamate.
Imams (Shiites)--Biography.
Mahdi.
Mahdism.
Mahdī, Muḥammad ibn al-Ḥasan, 869-