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Belle (Người đẹp và quái vật) Bell P-39 Airacobra Bellagio Bell 47 Bella Thorne Bella Poarch Bell UH-1 Iroquois Bell P-63 Kingcobra Bell 412 Bella RamseyTài liệu tham khảo
WikiPedia: Bell_47J_Ranger http://www.flightglobal.com/pdfarchive/view/1968/1... http://www.flightglobal.com/pdfarchive/view/1968/1... http://www.flightglobal.com/pdfarchive/view/1981/1... http://www.helis.com/database/modelorg/703/ http://www.helis.com/database/org/ar_argentine_coa... http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.airliners.net/photo/Spain---Air/Bell-47... http://www.bell47.net/Family/_Bell47Family.htm https://archive.org/details/internationaldir0000fr... https://archive.org/details/internationaldir0000fr...