(3GdYbO GdGOQGi ai eHGOi GdGOGQjI GdYdjG (B/ s - (3SejQ UGObs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1991)
Keywords: (3GdbGfhfs; (3GdbGfhf GdGOGQis; (3GdYbhO GdGOGQjIs