Ελικόπτερο (Greek Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ελικόπτερο" in Greek language version.

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aerospaceweb.org

Leishman, J. Gordon. Principles of Helicopter Aerodynamics. Cambridge aerospace series, 18. Cambridge: Cambridge University Press, 2006. ISBN 978-0-521-85860-1. Web extract Αρχειοθετήθηκε 2014-07-13 στο Wayback Machine.

Leishman, J. Gordon. Principles of Helicopter Aerodynamics. Cambridge aerospace series, 18. Cambridge: Cambridge University Press, 2006. ISBN 978-0-521-85860-1. Web extract Αρχειοθετήθηκε 2014-07-13 στο Wayback Machine.
Goebel, Greg. "The Invention Of The Helicopter." Vectorsite.net. Retrieved: 11 November 2008.