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Douglas_XB-22 Xem thêmThực đơn
Douglas_XB-22 Xem thêmLiên quan
Douglas MacArthur Douglas Costa Douglas A-4 Skyhawk Douglas A-26 Invader Douglas A-1 Skyraider Douglas A-3 Skywarrior Douglas DC-3 Douglas Aircraft Company Douglas A-20 Havoc Douglas EngelbartTài liệu tham khảo
WikiPedia: Douglas_XB-22 http://www.wpafb.af.mil/museum/research/bombers/b2... http://home.att.net/~jbaugher2/b22.html https://web.archive.org/web/20051227032707/http://... https://web.archive.org/web/20060722233642/http://...