(3HOGjI HdGfgGjI (B/ s - (3LGeha LhQLs; (3eMeO RGgQ GdefTGhi (B((3eJQLe(B)s ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1990)
Keywords: (3GdQjGVjGJs; (3GdajRjGAs; (3GdcjejGA GdMjhjIs; (3Gdchfs; (3GjfTJjfs; (3GdfSHjIs