(3QSGFd LGeYjI aj GdEYdGe (B/s - (3GdYhjfj,eMeO Ydj s ((3GdbGgQI (B:s (3ecJHI GdCfLdh GdeUQjI ,s, 1990)
Keywords: (3GdGYdGe s; (3QSGFd LGeYjI s