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Hughes D-2 Tham khảoThực đơn
Hughes D-2 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 D-2 http://www.joebaugher.com/usaf_fighters/p73.html http://library.nevada.edu/hughes/photos/sm_0321_01...