Hirth HM 504 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hirth HM 504" in English language version.

refsWebsite

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6^th place

6^th place

archive.org

"Werkstoff-Volumenanteile der 'AR' 79" [Materials proportions by volume of the AR 79 (advertising back matter) ]. Flugsport (in German). 31 (8). Frankfurt/Main: 229 [pdf 32]. 12 April 1939.