Raamatud David S. F. Portree
Humans to Mars: Fifty Years of Mission Planning, 1950-2000. NASA Monograph in Aerospace History, No. 21, 2001 (NASA SP-2001-4521)
David S. F. Portree, Nasa History Division
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NASAs Origins and the Dawn of the Space Age. Monograph in Aerospace History, No. 10, 1998
David S. F. Portree, Nasa History Division
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Humans to Mars: Fifty Years of Mission Planning, 1950-2000. NASA Monograph in Aerospace History, No. 21, 2001 (NASA SP-2001-4521)
David S. F. Portree, Nasa History Division
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Humans to Mars: Fifty Years of Mission Planning, 1950-2000 Monographs in Aerospace History #21
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Mir Hardware Heritage
David S. F. Portree, National Aeronautics And Administration
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Humans to Mars Fifty Years of Mission Planning, 1950 - 2000
DAVID S. F. PORTREE, National Aeronautics Administration
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