(3GdJYOOjI GdSjGSjI(B: (3OQGSI (B/ s - (3GMeO KGHJs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1990)
Keywords: (3GdeLJeYs; (3GdGMRGH GdSjGSjIs; (3GdfXe GdSjGSjIs; (3GdePGgH GdSjGSjIs