(3JCKjQ GdfaW GdNGe Ydi HYV GdaYGdjGJ GdaSdLjI ddSjGfhHcJQjG GdechfI ddMhjUdGJ GdeZGjQI h CKQg Ydi feh h EfHGJ GdQR (B/ s - (3GdYHjOj, EjGO eMeO Ydj aGVds ((3HZOGO (B:s (3LGeYI HZOGO,s, 1990)
(3QSGdI eGLSJjQ LGeYI HZOGOs
Keywords: (3GdMHhHs; (3GdCQRs