Instrument Flying: Basic, book, January 3, 1943; (https://texashistory.unt.edu/ark:/67531/metapth1176850/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Instrument Flying: Basic, book, January 3, 1943; (https://texashistory.unt.edu/ark:/67531/metapth1176850/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .