Low-excitation atomic gas around evolved stars - II. ISO observations of O-rich nebulae A. Castro-Carrizo, V. Bujarrabal, D. Fong, M. Meixner, A. G. G. M. Tielens, W. B. Latter and M. J. Barlow A&A, 367 2 (2001) 674-693 Published online: 15 February 2001 DOI: 10.1051/0004-6361:20000433