Chronology of Mars Exploration
- Overviews of every mission to Mars since 1960, including planned future missions.
- http://nssdc.gsfc.nasa.gov/planetary/chronology_mars.html

Mars Observer
- Spacecraft and mission profile from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/nmc/tmp/1992-063A.html

Mars 96 Orbiter
- Spacecraft and mission profile from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/nmc/tmp/1996-064A.html

Deep Space 2
- Spacecraft and mission profile from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/nmc/tmp/DEEPSP2.html

On Mars: Exploration of the Red Planet 1958-1978
- A NASA history book on the Viking and Mariner missions. Discusses the motives for these programs and the evolution of hardware. Includes information on the search for life on Mars, spacecraft assembly, landing site selection, and experiments performed on
- http://www.hq.nasa.gov/office/pao/History/SP-4212/on-mars.html

Zond 2
- Spacecraft and mission profile from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/nmc/tmp/1964-078C.html

Zond 3
- Spacecraft and mission profile from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/nmc/tmp/1965-056A.html

Mars 96
- Overview of the Russian mission launched in 1996 that failed to reach earth orbit.
- http://www.iki.rssi.ru/mars96/mars96hp.html

Mars Exploration
- Information on the Red Planet and links to the homepages of NASA's Mars exploration projects.
- http://mpfwww.jpl.nasa.gov/