(3GdeOGQS aj HjJ GdebOS (B: s (3aj GdYUQjf GdCjhHj hGdeedhcj hOhQgG aj GdMQcI GdacQjI (B/ s ((3YqeGf (B: s (3ecJHI GdCbUi , s, 1981)
Keywords: (3GdJQHjI hGdJYdjes