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doi.org
Houbolt, John Cornelius (1958). A Study of several aerothermoelastic problems of aircraft structures in high-speed flight (Thesis). ETH Zurich. doi:10.3929/ethz-a-000099619. hdl:20.500.11850/134942.
Houbolt, John Cornelius (1958). A Study of several aerothermoelastic problems of aircraft structures in high-speed flight (Thesis). ETH Zurich. doi:10.3929/ethz-a-000099619. hdl:20.500.11850/134942.
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"3 Missions, Modes, and Manufacturing". SP-4206 Stages to Saturn. History.nasa.gov. Archived from the original on October 31, 2004. Retrieved September 1, 2010.