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Facing the Heat Barrier - NASA's History Office

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<strong>Facing</strong> <strong>the</strong> <strong>Heat</strong> <strong>Barrier</strong>:<br />

A <strong>History</strong> of Hypersonics<br />

The NASA <strong>History</strong> Series<br />

T. A. Heppenheimer<br />

National Aeronautics and Space Administration<br />

NASA <strong>History</strong> Division<br />

<strong>Office</strong> of External Relations<br />

Washington, DC<br />

September 2007<br />

NASA SP-2007-4232

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