Hafner Rotabuggy (Vietnamese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hafner Rotabuggy" in Vietnamese language version.

refsWebsite

Global rank Vietnamese rank

low place

low place

1flightglobal.com

223^rd place

378^th place

flightglobal.com

Flight 1954 p821

groenbros.com

Charnov, Bruce. Autogiro to Gyroplane: 1923–2003. Hofstra University (as posted on the Groen Brothers Aviation web site).