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The Economic Viability of Mars Colonization Robert Zubrin Lockheed Martin Astronautics PO Box 179 Denver, CO 80201, USA Abstract
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Document Date: 2011-08-11 18:42:57
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The Economic Viability of Mars Colonization Robert Zubrin Lockheed Martin Astronautics PO Box 179 Denver, CO 80201, USA Abstract