• Von Braun Mars Expedition planned in 1969 using Apollo hardware http://www.astronautix.com/v/vonbraunmarpedition-1969.html 28 comments 3/2/2020 space
• Von Braun's final vision for a manned expedition to Mars - 1969 http://www.astronautix.com/v/vonbraunmarpedition-1969.html 4 comments 29/9/2016 space