(3GdeKbahf GdYQH h GdJQGK (B/ s - (3WQGHjTj, LhQLs ((3dfOf (B:s (3QjGV GdQjS,s, 1991)
Keywords: (3GdJMdjd GdfaSjs; (3GdCOH GdYQHjs; (3GdKbGaI GdYQHjIs