(3JGQjN GdadSaI GdZQHjI (B: s (3GdcJGH GdKGdK(B((3GdadSaI GdMOjKI(B) / s - (3QSd , HQJQGfOs; (3eMeO aJMi GdTfjWis ((3GdbGgQI (B: s (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1977)
Keywords: (3gjLds; (3LGf LGc QhShs; (3GdadSaI GdZQHjI GdMOjKIs; (3GdYbO GdGLJeGYis; (3cGfJs; (3djHfjRs; (3aQfSjS Hjchfs; (3HGjQhfs