Thomas A. Carlson (ed.), "Sirgan" in last modified January 14, 2014, http://syriaca.org/place/1734
    
        
            
                
                    Sirgan
                    
                    http://syriaca.org/place/1734
                    
                        
              David Wilmshurst
            
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        340
                        
                    
                
                
                    
                        
              Sulduz district
            
                    
                    
                        
              Ūrmī region