Colossus: The secrets of Bletchley Park's code-breaking computers
by B. Jack Copeland and others
ISBN 13: 9780199578146
Format: Paperback (480 pages) Publisher: OUP Oxford Published: 18 Mar 2010
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Colossus: The Secrets of Bletchley Park's Code-breaking Computers
ISBN 13: 9780192840554
Format: Hardcover (480 pages) Publisher: OUP Oxford Published: 23 Feb 2006