GRS evidence and the possibility of paleooceans on Mars - Dohm, J.; Baker, V.R.; Boynton, W.; Fairen, A.G.; Ferris, J.C.; Finch, M.; Furfaro, R.; Hare, T.M.; Janes, D.M.; Kargel, J.S.; Karunatillake, S.; Keller, J.; et al. (Planetary and Space Science, 2009)