"Archived copy". www.nasm.si.edu. Archived from the original on 5 December 2004. Retrieved 12 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
time.com
"Peace Ace". Time. 1927-01-24. Archived from the original on March 7, 2008. Retrieved 2007-02-16.
"Archived copy". www.nasm.si.edu. Archived from the original on 5 December 2004. Retrieved 12 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
"Peace Ace". Time. 1927-01-24. Archived from the original on March 7, 2008. Retrieved 2007-02-16.