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Gordon Welchman: Bletchley Park's Architect of Ultra Intelligence [Buy it!] | Joel Greenberg | USD 29.02 (Fri May 31 23:09:28 2024) | AbebooksUK | Parrot Books | ISBN10: 1848327528, ISBN13: 9781848327528, [publisher: Frontline Books] Hardcover [Hemel Hempstead, HERT, United Kingdom] [Publication Year: 2014] |