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Flettner (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Flettner" in English language version.

refsWebsite
Global rank English rank
2books.google.com
3rd place
3rd place

books.google.com (Global: 3rd place; English: 3rd place)

  • Hirschel, Ernst Heinrich; Prem, Horst; Madelung, Gero (2012-12-06). Aeronautical Research in Germany: From Lilienthal until Today. Springer Science & Business Media. pp. 299–300. ISBN 978-3-642-18484-0.
  • Griehl, Manfred (2012-10-24). X-Planes: German Luftwaffe Prototypes 1930-1945. Pen and Sword. pp. 264–269. ISBN 978-1-78303-419-2.