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Ravensboume to Airborne by David A. Craddock.
USA-printed edition. Research covers Lawrence Hargrave's pioneering work on aerodynamics, gliders and kites, including his sketches of equipment, concepts and designs. No photos. Softcover, 57 pp., 8-1/2" x 11", $21.95
(The two Craddock books may be purchased as a package for $34.95.)
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