Cahill, Jones F. Aerodynamic tests of an NACA 66(215)-116, a=0.6 airfoil with a 0.25c slotted flap for the Fleetwings XA-39 airplane. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc61411/. Accessed April 19, 2015.
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