Whitney, Warren J. & Wintucky, William T. Experimental Investigation of a 7-Inch-Tip-Diameter Transonic Turbine, report, January 16, 1958; (https://digital.library.unt.edu/ark:/67531/metadc52929/m1/1/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .