Focke-wulf F 19a "ente" Commercial Airplane (german) : a Tail-first High-wing Monoplane (1931)
NASA Technical Reports Server (NTRS) · leaf 10
Fig- H.A.C.A. Aircraft Circular No. 133 … General arrangement drawings of the Focke-Wulf Fig. 1 "Ente". Note the peculiar plan form of the front v;ing.
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
