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Stressed Coverings in Naval and Aeronautic Construction (1928)
NASA Technical Reports Server (NTRS) · leaf 52
Duralumin ,-Kagnesium .Magnesium Wood—> 0.003 … Density (d) Breaking load R in k /mm2 oNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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