(3CbOe GdeNWhWGJ GdYQHjI aj ecJHGJ GdYGde GdecJhHI (B: s (3efP UOQ GdESdGe MJi SfI (B500 (3g`(B= 1106(3e (B/ s - (3YhGO, chQcjSs (2000)
Keywords: (3GdeNWhWGJ(B. s; (3GdcJH GdbOjeI(B.s; (3GdHdOGf GdYQHjI(B.s