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Lorenz : breaking Hitler's top secret code at Bletchley Park / Captain Jerry Roberts.

by Roberts, Jerry.

Material type: book Book; Format: available online remote; Literary form: Not fiction Publisher: Stroud : The History Press, c2017Availability: Items available for loan: Science Museum London [Call number: 003.26:93 ROBERTS] (1).

The silent service comes of age [article] : the year 2000 marks the 100th anniversary of the US submarine service, which surprised the world in the century just ended / by Jerry Roberts.

by Roberts, Jerry.

Source: Sea history. - No.95 (Winter), p.18-19.Material type: article Article; Format: print Publisher: 2000-2001Availability: Items available for reference: Science Museum Wroughton [Call number: 629.12:93 SEA] (1).