The Galileo probe mass spectrometer: composition of Jupiter's atmosphere. - Niemann HB; Atreya SK; Carignan GR; Donahue TM; Haberman JA; Harpold DN; Hartle RE; Hunten DM; Kasprzak WT; Mahaffy PR; Owen TC; Spencer NW; et al. (Science (New York, N.Y.), 1996)