(3GdCOH GdQhSj bHd GdKhQI GdHdTajI h HYOgG (B/ s - (3YhV, QeSjSs ((3GdbGgQI (B:s (3GdgjFI GdeUQjI GdYGeI ddcJGH,s, 1987)
Keywords: (3GdCOH GdQhSjs; (3GdfbO GdCOHjs