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Robert "Skip" Penny | lit.salon
Robert "Skip" Penny
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Books by Robert "Skip" Penny (50 max)
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Design Considerations for Space Elevator Tether Climbers
2014
Cathy Swan, Peter Swan, Robert "Skip" Penny
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Space Elevator Survivability Space Debris Mitigation
2015
Cathy Swan, Peter Swan, Robert "Skip" Penny
