Sikorsky R-4 (Czech Wikipedia)

Analysis of information sources in references of the Wikipedia article "Sikorsky R-4" in Czech language version.

refsWebsite

Global rank Czech rank

439^th place

761^st place

1web.archive.org

1^st place

1^st place

1flightglobal.com

223^rd place

258^th place

af.mil

nationalmuseum.af.mil

"Fact Sheet: Sikorsky R-4." Archivováno 3. 12. 2013 na Wayback Machine. National Museum of the United States Air Force. Retrieved: 26 September 2010. (anglicky)

flightglobal.com

Flight 1946 (anglicky)

web.archive.org

"Fact Sheet: Sikorsky R-4." Archivováno 3. 12. 2013 na Wayback Machine. National Museum of the United States Air Force. Retrieved: 26 September 2010. (anglicky)