Hydrated salt minerals on Europa's surface from the Galileo near-infrared mapping spectrometer (NIMS) investigation - McCord, T.; Hansen, G.; Matson, D.; Johnson, T.; Crowley, J.K.; Fanale, F.; Carlson, R.; Smythe, W.; Martin, P.; Hibbitts, C.; Granahan, J.; Ocampo, A. (Journal of Geophysical Research E: Planets, 1999)