0297768328 SHOW MOOCHABLE + ? RELATED SEARCHES > ADVANCED SEARCH > HIDE COVERS - ASIN Title: The Ultra secret Author: F. W Winterbotham Description: Product Description Operation Ultra was designed to intercept and decode German signals sent using Enigma, the top-secret German cypher machine. F.W. Winterbotham, was the man responsible for the organization... (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 >