Williams, Walter C.; Forsyth, Charles M. & Brown, Beverly P. General handling-qualities results obtained during acceptance flight tests of the Bell XS-1 airplane, report, April 19, 1948; (https://digital.library.unt.edu/ark:/67531/metadc57563/m1/1/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .