Schröder, C., Klingelhöfer, G., Morris, R. V., Rodionov, D. S., de Souza, P. A., Ming, D. W., Yen, A. S., Gellert, R., & Bell III, J. F. (2005). Weathering of basaltic rocks from the Gusev plains up into the Columbia Hills from the perspective of the MER Mössbauer spectrometer. In Lunar and Planetary Science XXXVI. Houston: Lunar and Planetary Institute.