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Enigma : the battle of the code | Bok | 359.3257 Har
Harris, Robert / - London : Clays Ltd, 1960. [Bok]. - 362 s. - Språk: Engelsk | Harris, Robert | 1960 |
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The U-boats against Canada : German submarines in Canadian waters | Bok | 359.3257 Had
Headly, Michael L. / - Quebec : McGill-Queens Universyti Press, 1985. [Bok]. - 362 s. - Språk: Engelsk | Headly, Michael L. | 1985 |