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Riveting in Metal Airplane Construction. Part I : Riveting Methods and Equipment in German Metal Airplane Construction (1930)
NASA Technical Reports Server (NTRS) · leaf 52
N.A.C.A. Teohnical Memorandum No.596 Figs.16,33,36NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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