Thomas A. Carlson (ed.), "ʻKoma’" in last modified January 14, 2014, http://syriaca.org/place/2328
    
        
            
                
                    ʻKoma’
                    
          
                    http://syriaca.org/place/2328
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        128, 137, 351