An absorption-selected survey of neutral gas in the Milky Way halo - New results based on a large sample of Ca ii, Na i, and H i spectra towards QSOsN. Ben Bekhti, B. Winkel, P. Richter, J. Kerp, U. Klein and M. T. MurphyA&A, 542 (2012) A110DOI: https://doi.org/10.1051/0004-6361/201118673