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ELMER SPERRY, INVENTOR AND ENGINEER

By Hughes, Thomas Parke Hughes

Baltimore/London:: Johns Hopkins Pr.. VG+, unmarked, illus. Hardback; DJ-G.. c. 1971. ISBN: xvii + 348 pp. [Inventor of gyrocompass, automatic pilot & feedback. ISBN: controls]. Catalogs: INVENTIONS. Keywords: INVENTIONS, ENGINEERING, GYROCOMPASS, AUTOMATIC PILOT.

$30.00