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Manhigh Balloon Flights in Perspective
Summary results of the first United States manned orbital space flight
Extraterrestrial resources in life support systems
Second Annual Meeting of the Working Group on Extraterrestrial Resources
The biological exploration of mars.
Martian landing sites for the voyager mission.
Second Annual Biomedical Research Conference Proceedings
Opportunities in space exploration in the future - An imaginative projection
Lunar resources - Their value in lunar and planetary exploration.