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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_O-46 http://www.centennialofflight.gov/essay/Aerospace/... http://www.airwar.ru/enc/spyww2/o46.html https://commons.wikimedia.org/wiki/Category:Dougla...