(3OQGSGJ JWHjbjI Mhd GdJaSjQ GdEYdGej GdMOjK (B/ s - (3TQa, YHO GdYRjRs ((3HjQhJ (B:s (3OGQ GdLjd,s, 1991)
Keywords: (3GdCOH GdYQHjs