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2. Galileo Orbit Determination for the Gaspra Asteroid Encounter;Kallemeyn,1992
3. Optical Navigation for the Galileo Gaspra Encounter;Vaughan,1992
4. Galileo 1989 VEEGA Mission Description;D'Amario,1989
5. Lunar Impact Basins and Crustal Heterogeneity: New Western Limb and Farside Data from Galileo;Belton;Science,1992