Dust in 3CR radio galaxies: On the FR 1 – FR 2 difference S. A. H. Müller, M. Haas, R. Siebenmorgen, U. Klaas, K. Meisenheimer, R. Chini and M. Albrecht A&A, 426 2 (2004) L29-L32 Published online: 11 October 2004 DOI: 10.1051/0004-6361:200400067