An early mystic of Baghdag : a study of the life and teaching of Harith B. Asasd al-Muhasibi A.D. 781-857 /
An early mystic of Baghdag : a study of the life and teaching of Harith B. Asasd al-Muhasibi A.D. 781-857 / Margaret Smith - London : Sheldon Press, c1977 - 311 p.
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