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Douglas MacArthur Douglas Costa Douglas A-4 Skyhawk Douglas A-26 Invader Douglas A-1 Skyraider Douglas Aircraft Company Douglas A-3 Skywarrior Douglas DC-3 Douglas A-20 Havoc Douglas B-66 DestroyerTài liệu tham khảo
WikiPedia: Douglas_B-18_Bolo http://members.aol.com/cba1974/myhomepage/B18walka... http://www.rcaf.com/aircraft/patrol/digby/index.ph... http://aeroweb.brooklyn.cuny.edu/locator/manufact/... http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.nationalmuseum.af.mil/factsheets/factsh... http://uboat.net/boats/u512.htm https://web.archive.org/web/20081012140038/http://... https://commons.wikimedia.org/wiki/Category:Dougla...