Solar Sails : A Novel Approach to Interplanetary Travel
Giovanni Vulpetti
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Living Off the Land in Space : Green Roads to the Cosmos
C Bangs
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Solar Sails : A Novel Approach to Interplanetary Travel
Giovanni Vulpetti
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Paradise Regained : The Regreening of Earth
Greg Matloff
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Harvesting Space for a Greener Earth
Greg Matloff
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