The border air patrol 1918-1919. Picture, artwork, 1920; (https://texashistory.unt.edu/ark:/67531/metapth11931/m1/1/: accessed May 22, 2025), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
The border air patrol 1918-1919. Picture, artwork, 1920; (https://texashistory.unt.edu/ark:/67531/metapth11931/m1/1/: accessed May 22, 2025), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .