(3GdWQGR (B: s (3GdeJVef dCSQGQ GdHdGZI hYdhe MbGFb GdEYLGR (B/ s ((3ecJHI GdeYGQa , s, 1980)
Keywords: (3GdHdGZI GdYQHjI; GdEYLGR aj GdbQBf GdcQje; GdfbO GdCOHj GdYQHjs