Thomas A. Carlson (ed.), "Estep" in last modified January 14, 2014, http://syriaca.org/place/1207
    
        
            
                
                    Estep
                    
                    
                        Raikan district
                        Hakkārī region
                    
          
                    http://syriaca.org/place/1207
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
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