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Kellen Kariuki Kellett XR-8 Kellett KD-1 Kellett Autogiro Corporation Kellett XR-10 Keller, Texas Kellerton, Iowa Kellenbach Kelley, Iowa Kelleys Island, OhioTài liệu tham khảo
WikiPedia: Kellett_Autogiro_Corporation http://www.flightglobal.com/pdfarchive/view/1956/1... http://www.flightglobal.com/pdfarchive/view/1958/1...