Thomas A. Carlson (ed.), "Ṭus" in last modified January 14, 2014, http://syriaca.org/place/2398
    
        
            
                
                    Ṭus
                    Ṭūs
                    
          
                    http://syriaca.org/place/2398
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        343, 344