Thomas A. Carlson (ed.), "Chal" in last modified January 14, 2014, http://syriaca.org/place/737
    
        
            
                
                    Chal
                    
                    
                        Hakkārī region
                    
          
                    http://syriaca.org/place/737
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        148, 282, 283, 285, 299