Humans to Mars : fifty years of mission planning, 1950-2000 /

Bibliographic Details
Main Author:	Portree, David S. F.
Format:	Government Document Microform Book
Language:	English
Published:	Washington, DC : NASA History Division, Office of Policy and Plans, NASA Headquarters, 2001.
Series:	Monographs in aerospace history ; no. 21. NASA SP (Series) ; 4521.
Subjects:	United States. > National Aeronautics and Space Administration. Space flight to Mars > Planning.