(3GdecJHGJ GdeJNUUI (B:s (3GOGQJgG h JfXjegG h NOeGJgG (B/s - (3HOQ (B: (3GMeO G(B.(3G(B.s; (3bGSe(B: (3MTeJ(B.s ((3GdchjJ (B:s (3hcGdI GdeWHhYGJ (B:s, 1972)
Keywords: (3GdecJHGJ GdeJNUUI(B.s; (3GdecJHGJ GdeJNUUIs -- (3JfXje hGOGQIs; (3eQGcR GdeYdheGJ(B.s; (3eQGcR GdeYdheGJs -- (3JfXje hGOGQIs