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Structural Methods Employed by the Schutte-lanz Airship Company (1925)
NASA Technical Reports Server (NTRS) · leaf 80
■I Fig. 24 Portion of airship frame, without cover. pig. 2b Junction of main ring ise^o /i.s.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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