Low-column density HVC and IVC gas in the halo of the Milky Way N. Ben Bekhti, P. Richter, B. Winkel, F. Kenn, T. Westmeier and M. Murphy EAS Publications Series, 56 (2012) 313-317 Published online: 17 September 2012 DOI: 10.1051/eas/1256051