(3GdMeGjI GdOhdjI ddGSJKeGQ GdCLfHj GdeHGTQ hOhQ GdJMcje ai JShjI efGRYGJ GdGSJKeGQ (B/s - e ((3GdbGgQI(B:s (3OGQ GdfgVI GdYQHjI , s, 1990)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdOhdj GdYGes