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Robert Zubrin

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Mars Direct Space Exploration, the Red Planet, and the Human Future, Robert Zubrin

Mars Direct

by Robert Zubrin

List: $3.98

Sale: $2.79

Club: $1.99

Unabridged: 1 hr 27 min
Narrator: Erik Synnestvedt
Published: 02/12/2013
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The Case for Mars The Plan to Settle the Red Planet and Why We Must, Robert Zubrin

The Case for Mars

by Robert Zubrin

List: $20.99

Sale: $14.70

Club: $10.49

Unabridged: 14 hr 31 min
Narrator: Sean Runnette
Published: 02/13/2018

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