1. Opportunities and Choices in Space Science, 1974;Goody,1975
2. Vision and Voyages for Planetary Science in the Decade 2013-2022;Squyres,2011
3. Automated (unmanned) mars sample return missions;Niehoff,1967
4. Automated mars surface sample return mission/system concepts;Odom,1969
5. Extension of atmospheric dust loading to high altitudes during the 2001 mars dust storm: MGS TES limb observations;Clancy;Icarus,2010