The man who broke purple : the life of the world's greatest cryptologist, Colonel William F. Friedman /
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| Format: | Book |
| Language: | English |
| Published: |
London :
Weidenfeld and Nicolson,
[1977]
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| Item Description: | Includes index. |
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| Physical Description: | xi, 212 pages, 4 unnumbered leaves of plates : illustrations ; 23 cm. |
| ISBN: | 0297772791 : |