Thomas A. Carlson (ed.), "Ṭirhan" in last modified January 14, 2014, http://syriaca.org/place/2396
    
        
            
                
                    Ṭirhan
                    Ṭirhān
                    
          
                    http://syriaca.org/place/2396
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        127, 175, 344, 345, 346