A 12CO () and () atlas of circumstellar envelopes of AGB and post-AGB stars R. Neri, C. Kahane, R. Lucas, V. Bujarrabal and C. Loup Astron. Astrophys. Suppl. Ser., 130 1 (1998) 1-64 Published online: 15 May 1998 DOI: 10.1051/aas:1998213