Lockheed XH-51 (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Lockheed XH-51" in Spanish language version.

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armyavnmuseum.org

«Rotary Wing Collection». United States Army Aviation Museum. Archivado desde el original el 13 de julio de 2012.

Lentine, F. P. ; Groth, W. P. ; Oglesby, T. H. "RESEARCH IN MANEUVERABILITY OF THE XH-51A COMPOUND HELICOPTER Archivado el 3 de septiembre de 2014 en Wayback Machine." Lockheed, June 1968. Accessed: 27 August 2014.

Robb, Raymond L. "Hybrid helicopters: Compounding the quest for speed" Archivado el 27 de septiembre de 2006 en Wayback Machine., Vertiflite. Summer 2006. American Helicopter Society. Accessed on 8 November 2008.
Hirschberg, Michael J. and David K. Daley. "Lockheed", US and Russian Helicopter Development In the 20th Century Archivado el 5 de junio de 2001 en Wayback Machine.. American Helicopter Society, International. Accessed on 16 November 2007.

Connor, R. Lockheed CL-475. Smithsonian National Air & Space Museum. Revised on 15 August 2002. Accessed on 3 September 2007.
Robb, Raymond L. "Hybrid helicopters: Compounding the quest for speed" Archivado el 27 de septiembre de 2006 en Wayback Machine., Vertiflite. Summer 2006. American Helicopter Society. Accessed on 8 November 2008.
Hirschberg, Michael J. and David K. Daley. "Lockheed", US and Russian Helicopter Development In the 20th Century Archivado el 5 de junio de 2001 en Wayback Machine.. American Helicopter Society, International. Accessed on 16 November 2007.
Lentine, F. P. ; Groth, W. P. ; Oglesby, T. H. "RESEARCH IN MANEUVERABILITY OF THE XH-51A COMPOUND HELICOPTER Archivado el 3 de septiembre de 2014 en Wayback Machine." Lockheed, June 1968. Accessed: 27 August 2014.
«Rotary Wing Collection». United States Army Aviation Museum. Archivado desde el original el 13 de julio de 2012.