Douglas XP-48 (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Douglas XP-48" in Italian language version.

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archive.org

Norton, pag. 156. (EN) Bill Norton, U.S. Experimental & Prototype Aircraft Projects: Fighters 1939–1945, North Branch, Minnesota, Specialty Press, 2008, ISBN 978-1-58007-109-3.