Root, L. E. The development of satisfactory flying qualities on the Douglas dive bomber, model SBD-1 through flight testing successive modifications in control-surface area, hinge-line location, and aerodynamic-balance nose shape, report, May 1942; (https://digital.library.unt.edu/ark:/67531/metadc61066/m1/1/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .