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United States Diplomatic Codes and Ciphers, 1775-1938 (Paperback)
Ralph E. Weber
R
1,717
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Ships in 12 - 17 working days
Seward's Other Folly - America's First Encrypted Cable (Paperback)
National Security Agency
,
Ralph E. Weber
List Price
R
321
R
320
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Ships in 10 - 15 working days
Masked Dispatches - Cryptograms and Cryptology in American History, 1775-1900 (Paperback)
Ralph E. Weber
List Price
R
802
R
794
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Masked Dispatches - Cryptograms and Cryptology in American History, 1775-1900 (Paperback)
Ralph E. Weber
,
Center for Cryptologic History
R
940
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Ships in 10 - 15 working days