Ehlers-Harrison-type transformations in dilaton-axion gravity.

The ten-parametric internal symmetry group is found in the [ital D]=4 Einstein-Maxwell-dilaton-axion theory restricted to space-times admitting a Killing vector field. The group includes dilaton-axion SL(2,[ital R]) duality and Harrison-type transformations which are similar to some target-space duality boosts, but act on a different set of variables. A new symmetry is used to derive a seven-parametric family of rotating dilaton-axion Taub-NUT dyons.