Thomas A. Carlson (ed.), "ʿEṣṣān" in last modified December 9, 2016, http://syriaca.org/place/1208
    
        
            
                
                    ʿEṣṣān
                    Ṣeyān
                    Eṣṣān
                    ‘Eṣṣān
                    
                    
                        Ṭalānā district
                        ʿAqrā region
                    
          
                    http://syriaca.org/place/1208
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        146, 154, 156, 158, 162