The doctrine of the Ṣūfīs = Kitāb al-taʻarruf li-madhhab ahl al-taṣawwuf /

by Kalābādhī, Muḥammad ibn Ibrāhīm, active 10th century
Cambridge ; New York : Cambridge University Press, 1977

Avicenna on theology /

by Avicenna, 980-1037
Westport, Conn. : Hyperion Press, 1979