Internal-Flow Systems for Aircraft, report, October 1940; (https://digital.library.unt.edu/ark:/67531/metadc54534/m1/4/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
Internal-Flow Systems for Aircraft, report, October 1940; (https://digital.library.unt.edu/ark:/67531/metadc54534/m1/4/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .