Microwave Powered Airship System Design for High-Altitude Power Relay and Other Applications
Dynamic performance of Surveyor throttleable engine when propellants contain dissolved helium.
Observations on man in an oxygen-helium environment at 380 mm. Hg total pressure. II - Respiratory.
A large ultrahigh-vacuum environmental chamber with liquid-helium-cooled liner.
A large ultrahigh-vacuum environmental chamber with liquid-helium-cooled liner.
The possibility of substituting helium for nitrogen in the cabins of spacecraft
Lunar Helium-3: Mining Concepts, Extraction Research, and Potential ISRU Synergies