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The Blackburn "Bluebird" "two-seat training and sport airplane (1927)

NASA Technical Reports Server (NTRS) · leaf 6

An illustration from The Blackburn "Bluebird" "two-seat training and sport airplane, 1927, leaf 6
N.A.C.A. Aircraft Circular No.45 .

NASA Technical Reports Server (NTRS)

Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.

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