(3CSGdjH GdJOQjS h GdJbhje aj GdJQHjI GdESdGejI (B: s (3OQGSGJ ejOGfjI (B/ s - (3YHO Gddg, YHO GdQMef UGdMs ((3YeGf (B:s (3OGQ GdHTjQ,s, 1997)
Keywords: (3GdESdGes; (3GdJQHjI GdESdGejIs