0295976993 SHOW MOOCHABLE + ? RELATED SEARCHES > ADVANCED SEARCH > HIDE COVERS - ASIN Title: Whirlybirds: A History of the U.S. Helicopter Pioneers Author: Jay P. Spenser Description: Product Description No one person or group invented the helicopter. Basically unstable, filled with unreliable parts, and assailed by countless forces and vibrations, the helicopter presented its inventors wi... (more) Available: No copies available WISHLIST ADD + SAVE FOR LATER + AMAZON > RECOMMEND > DETAIL > Search BookMooch for a book: SEARCH BOOKMOOCH > Search Amazon for a book: amazon.co.uk amazon.de amazon.es amazon.fr amazon.it amazon.cn SEARCH AMAZON >