Alfred I. Roman Convertiplanes

hesham

hesham

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Hi,

http://www.avia-it.com/act/biblioteca/periodici/PDF%20Riviste/Alata/Alata%201950%2005.pdf

https://www.google.st/patents/US2621001?dq=alfred+roman+airplane&hl=pt-PT&sa=X&ved=0ahUKEwjkvPnB9eHPAhVKKMAKHTBiAfoQ6AEIJTAB
 

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