Humans to Mars: Fifty Years of Mission Planning, 1950-2000
by David S. F. Portree
Publisher: NASA History Division 2001
Number of pages: 151
By examining the evolution of 50 mission studies over the past 50 years, David Portree gives us a sense of the many options that Mars human space flight planners in the United States have explored. Portree covers a wide variety of ideas for human exploration of Mars...
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