Jolliff, B. L. (Brad L.); Papike, J. J. (James Joseph), 1937-2020; https://orcid.org/0000-0002-8294-4501 (Lunar and Planetary Institute, 2006)
Sulfate compounds are abundant at the martian surface — as first discovered by the Viking landers and now convincingly proven by instruments on current rovers and orbiter spacecraft. By analogies with terrestrial systems, ...