Thomas A. Carlson (ed.), "Mar Yoḥannan" in last modified January 14, 2014, http://syriaca.org/place/2123
    
        
            
                
                    Mar Yoḥannan
                    Mār Yōḥannān
                    
                    
                        Gāwīlan
                        Anzel district
                        Ūrmī region
                    
          
                    http://syriaca.org/place/2123
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        327, 329, 369