(3JGQjN GQHd (B:s (3GdeSei fHGgI GdHdO GdNGed Hef hQOg ef GdGeGKd (B/s - (3GdOQHdj, TQa GdOjf GHj GdHQcGJ s ((3HZOGO(B:s (3efThQGJ hRGQI GdKbGaI hGdGYdGe,s, 1980)