WSRT Faraday tomography of the Galactic ISM at m - First results for a field at (l, b)D. H. F. M. Schnitzeler, P. Katgert and A. G. de BruynA&A, 471 2 (2007) L21-L24DOI: https://doi.org/10.1051/0004-6361:20077635