Stratospheric Balloons : Science and Commerce at the Edge of Space
Manfred "Dutch" von Ehrenfried
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From Cave Man to Cave Martian : Living in Caves on the Earth, Moon and Mars
Manfred "Dutch" von Ehrenfried
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The Artemis Lunar Program : Returning People to the Moon
Manfred "Dutch" von Ehrenfried
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Perseverance and the Mars 2020 Mission : Follow the Science to Jezero Crater
Manfred "Dutch" von Ehrenfried
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Apollo Mission Control : The Making of a National Historic Landmark
Manfred "Dutch" von Ehrenfried
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