North American XB-28 Dragon (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "North American XB-28 Dragon" in Polish language version.

refsWebsite

Global rank Polish rank

1web.archive.org

1^st place

1^st place

1joebaugher.com

5,569^th place

8,252^nd place

joebaugher.com

North American XB-28 Dragon. joebaugher.com. [dostęp 2012-07-04]. (ang.).

web.archive.org

North American XB-28. nationalmuseum.af.mil. [dostęp 2012-07-04]. (ang.).