(3JGQjN GdhUGjG (B/ s - (3CHh djdi, aQL eMehOs ((3GdOhMI (B:s (3OGQ GdKbGaI ddWHGYI h GdfTQ h GdJhRjY,s, 1997)
Keywords: (3GdCOH GdYQHjs; (3GdMce (B((3GdCeKGd(B)s; (3GdhUGjGs