(3JWhQ GdacQ GdbGfhfj (B:s (3OQGSI JGQjNjI aj adSaI GdbGfhf (B/s - (3Zfje,CMeO eMeO s ((3GdbGgQI (B:s (3eWHYI GWdS ,s, 1972)
Keywords: (3GdadSaIs; (3GdadSaI GdjhfGfjIs