The helicopter : history, piloting, and how it flies
- by John Fay ; illustrated by Lucy Raymond, David Gibbings, Dulcie Legg
- 3d rev. ed.
- Newton Abbot ; North Pomfret, Vt. : David & Charles, 1976
The god machine : from boomerangs to black hawks, the story of the helicopter
- James R. Chiles
- 354 p. : ill. ; 24 cm
- New York, N.Y. : Bantam Book, 2007
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