(3OQhS aj TQM bGfhf GdYbhHGJ GdLRGFQj (B/s - (3YHO Gddg, SdjeGfs ((3GdLRGFQ (B:s (3OjhGf GdeWHhYGJ GdLGeYjI ,s, 1990)
Keywords: (3bGfhf GdYbhHGJs