Katastrofa lotnicza w Pikardii (1922) (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Katastrofa lotnicza w Pikardii (1922)" in Polish language version.

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chez-alice.fr

"APPENDIX B – Previous significant midair occurrences", Review of ACAS RA Downlink (PDF), www.eurocontrol.int, p. 20 (page 26 of document), archived from the original (pdf) on 27 September 2007, retrieved 7 December 2007

"London-Paris machines collide". Flight: 215. 13 April 1922. Retrieved 29 March 2007.
"APPENDIX B – Previous significant midair occurrences", Review of ACAS RA Downlink (PDF), www.eurocontrol.int, p. 20 (page 26 of document), archived from the original (pdf) on 27 September 2007, retrieved 7 December 2007

Jackson, Aubrey Joseph (1973). British Civil Aircraft since 1919, Vol. 2. London: Putnam. OCLC 59161340.