The NASA Astrophysics Data System: Overview Michael J. Kurtz, Guenther Eichhorn, Alberto Accomazzi, Carolyn S. Grant, Stephen S. Murray and Joyce M. Watson Astron. Astrophys. Suppl. Ser., 143 1 (2000) 41-59 Published online: 15 April 2000 DOI: 10.1051/aas:2000170