Istakhrī, Iḥsān Allāh ʻAlī. <br/><br/>
Uṣūl-i taṣavvuf. 

 - [pref.  1338 (1960)] 
 - 6, 755 p.  geneal. tables.  23 cm. 
<br/><br/> Romanized. 
<br/><br/><label>LCCN: </label>ne 68003075  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sufism
<br/><br/><label>LC Class. No.: </label>BP189  / .I87