Thực đơn
Hughes_XF-11 Tham khảoThực đơn
Hughes_XF-11 Tham khảoLiên quan
Hughes TH-55 Osage Hughes H-4 Hercules Hughes D-2 Hughes XF-11 Hughes OH-6 Cayuse Hughes XH-17 Hughes Springs, Texas Hughesville, Pennsylvania Hughes, Arkansas Hughes, WisconsinTài liệu tham khảo
WikiPedia: Hughes_XF-11 http://www.check-six.com/Crash_Sites/XF-11_crash_s... http://digital.library.unlv.edu/hughes/xf11.php