Thomas A. Carlson (ed.), "Sidos" in last modified January 14, 2014, http://syriaca.org/place/1726
    
        
            
                
                    Sidos
                    Sīdōs
                    
                    http://syriaca.org/place/1726
                    
                        
              David Wilmshurst
            
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
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              Tabrīz region