Focke-Achgelis Fa 223 (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Focke-Achgelis Fa 223" in Catalan language version.

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Le Bec, Yves.. La véritable histoire de l'hélicoptère : de 1486-2005. Chavannes-près-Renens: J. Ducret, 2005. ISBN 2-8399-0100-5.
Ford, Roger, 1947-. Germany's secret weapons of World War II. ISBN 978-1-909160-56-9.
Nowarra, Heinz J.. German helicopters, 1928-1945. West Chester, PA: Schiffer Military History, 1990. ISBN 0-88740-289-5.
Lambermont, Paul Marcel.. Helicopters and autogyros of the world. Cassell, 1970. ISBN 0-304-93390-2.
Polmar, Norman.. Military helicopters of the world : military rotary-wing aircraft since 1917. Annapolis, Md.: Naval Institute Press, 1981. ISBN 0-87021-383-0.
Salzburg 1945-1955 : Zerstörung und Wiederaufbau. Salzburg: Salzburger Museum Carolino Augusteum, 1995. ISBN 3-901014-43-8.
«Fa 223 Henrich Focke's Singular Kite, Part Two.». Air International. Pilot Press, 26, 6, Juny 1984. ISSN: 0306-5634.