Observations of Asteroids 66 Maja and 951 Gaspra, Possible Flyby Targets for "Cassini" and "Galileo" Missions Barucci, M. A. ; Fulchignoni, M. ; di Martino, M. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: June 1989 Bibcode: 1989BAAS...21..963B