(3GdeQGcH GdYQHjI (B: (3JGQjNgG hGfhGYgG (B/ s - (3YHOGddg jhSa GdZfjes; (3MSf UGdM TgGHs ([S.N] : (3eDSSI GdchjJ ddJbOe GdYdei , s, 1987)
Keywords: (3GdJGQjN GdGSdGeis; (3GdYdhe YfO GdYQHs; (3GdMVGQI GdGSdGejIs; (3HfGA GdSafs