Holtzclaw, Ralph W. & Weisman, Yale. Wind Tunnel Investigation of the Effects of Slot Shape and Flap Location on the Characteristics of a Low-Drag Airfoil Equipped with a 0.25-Chord Slotted Flap, report, December 1944; (https://digital.library.unt.edu/ark:/67531/metadc61426/m1/1/: accessed April 18, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .