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Concrete airship sheds at Orly, France. Part II (1925)
NASA Technical Reports Server (NTRS) · leaf 42
N.A.C.A. Technical Memorandum !!o.333 Figs.31 & 32 … Fig. 32 Assembly of lower concrete girder irlth wooden framework of the centering.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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