(3JGQjN TQbj GdGQOf aj YUQ OhdI GdeeGdjc GdGhdi (B:s - (3ZhGfeI ,jhSa OQhjTs ((3YeGf (B:s (3hRGQI GdKbGaI hGdTHGH ,s, 1979)
Keywords: (3YUQ GdeeGdjc (B-(3GdGQOf s