Contribution to the technique of landing large airships. Part II (1929)
NASA Technical Reports Server (NTRS) · leaf 38
N.A.C.A. Technical MGniorandxim No.513 FiBe,84 & 86 'Fig.84 Eddies behind the Lakehurst shed and their effect on an entering airship. … Fig.86 Airship shads with ?/idened entrances.
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.