List of rotorcraft (English Wikipedia)

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

refsWebsite

Global rank English rank

low place

7,155^th place

3^rd place

low place

1^st place

1,747^th place

1,277^th place

low place

aerofiles.com

Eckland, K.O. (March 7, 2009). "American airplanes: Al - Az". Aerofiles.com. Retrieved January 27, 2011.
"American airplanes: Da - DY". Aerofiles.com. 2008-08-15. Retrieved 2011-02-06.
"American airplanes: Ga - Go". Aerofiles.com. 2008-08-15. Retrieved 2011-02-07.
"American airplanes: La - Li". Aerofiles.com. 2008-08-15. Retrieved 2011-02-14.
"American airplanes: ro - ry". Aerofiles.com. 2009-02-25. Retrieved 2011-03-16.

"Petróczy-Kármán-Žurovec PKZ 2 Helicopter". oldmachinepress. Retrieved 13 September 2013.

Leishman, J. Gordon. "A History of Helicopter Flight". terpconnect.umd.edu. Archived from the original on 13 July 2014. Retrieved 15 July 2014.

Leishman, J. Gordon. "A History of Helicopter Flight". terpconnect.umd.edu. Archived from the original on 13 July 2014. Retrieved 15 July 2014.