(3TQM bGfhf GdYbhHGJ GdbSe GdNGU (B/s - (3ahRjI YHOGdSJGQs ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI(B,s (3eWHYI LGeYI GdbGgQI hGdcJGH GdLGeYi (B,s, 1982)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdLfGFi s; (3bGfhf GdYbhHGJ GdbSe GdNGUs