Columbia subject headings:
Ibadites--History--Sources.
Kharijites--History--Sources.
Harvard subject headings:
Ibn Ibāḍ, ʻAbd Allāh--Correspondence.
Kharijites--History.
ʻAbd al-Malik ibn Marwān, Caliph, 642-705.
Princeton subject headings:
Ibadites--History--Sources.
Kharijites--History--Sources.