Inside Out Library · ExploreThe Frictionless Flow in the Region Around Two Circles (1931)NASA Technical Reports Server (NTRS) · leaf 13II.A.C.A. Technical Memorandum Ko. 626 Figs. 2a,213,3NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from The Frictionless Flow in the Region Around Two CirclesMore like this
