(3ai GdfbO GdbUUi (B/ s - (3YHOGdLHGQ YHGSs ((3GdYQGb (B:s (3efThQGJ hRGQI GdKbGaI hGdGYdGe ,s, 1980)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdYQHjI (B- (3JGQjN hfbOs