(3GdGYdGe h GdGJUGd GdLeGgjQj (B/s - (3GHQGgje, EeGes ((3GdbGgQI (B:s (3ecJHI GdGfLdhGdeUQjI ,s, 1975)
Keywords: (3GdGJUGd GdLeGgjQjs; (3GdGYdGe s