Finch, Thomas W. & Briggs, Donald W. Preliminary Results of Stability and Control Investigation of the Bell X-5 Research Airplane, report, February 11, 1953; (https://digital.library.unt.edu/ark:/67531/metadc59526/m1/1/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .