The distribution of ND2H in LDN 1689N M. Gerin, D. C. Lis, S. Philipp, R. Güsten, E. Roueff and V. Reveret A&A, 454 2 (2006) L63-L66 Published online: 11 July 2006 DOI: 10.1051/0004-6361:20065401