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North American P-51 Mustang North Carolina (lớp thiết giáp hạm) North American F-86 Sabre Northrop Grumman B-2 Spirit Northrop F-5 Northrop Grumman RQ-4 Global Hawk North American B-25 Mitchell Northrop P-61 Black Widow North American F-100 Super Sabre North Bucks & District Football LeagueTài liệu tham khảo
WikiPedia: Northrop_F-20_Tigershark http://www.f20a.com/ http://www.f20a.com/f20faq.htm http://query.nytimes.com/gst/fullpage.html?res=950... http://select.nytimes.com/gst/abstract.html?res=F5... http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.casciencectr.org/Exhibits/AirAndSpace/A... https://commons.wikimedia.org/wiki/F-20_Tigershark...