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The Delay in Airplane Production, An Army of 5,000,000 Men, and more

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Scientific American Magazine Vol 118 Issue 18This article was originally published with the title “The Delay in Airplane Production, An Army of 5,000,000 Men, and more” in Scientific American Magazine Vol. 118 No. 18 (), p. 404
doi:10.1038/scientificamerican05041918-404