(3GdbhGYO GdYGeI aj bGfhf GdYbhHGJ GdebGQf (B/ s - (3GHQGgje , GcQe fTCJ s ((3HZOGO (B: s (3GdecJHI GdbGfhfjI , s, 1998)
Keywords: (3bGfhf GdYbhHGJ s