(3fTCI GdUMGaI GdYQHjI HGdCScfOQjI (B:s 1873-1882(3e (B/s - (3GdbHGfj,YHO GdYdje s ((3eUQ (B:s (3GdgjFI GdeUQjI GdYGeI ddcJGH ,s, 1973)
Keywords: (3GdCgQGes; (3LQjOI eUQs; (3UMGaI GdbGgQIs