(3MQH GdeYdheGJ Hjf GdYQH h GSQGFjd (B/s - (3CHh HcQ, jhSa s; (3SGde (B,(3fHjd s ((3OeTb (B:s (3OGQ GdLdjd ,s, 1989)
Keywords: (3GSQGFjd s; (3YQH s; (3MQH s; (3eYdheGJ s