(3GdQDjG GdGHOGYjI ai TYQ YHOGdhgGH GdHjGJi (B/ s - (3YHOGdYRjR TQas ((3HjQhJ (B: s (3OGQ GdLjd , s, 1991)
Keywords: (3GdTYQ GdYQHis; (3JGQjN hfbOs; (3YHOGdhgGH GdHjGJis