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1
The Reader of Gentlemen's Mail : Herbert O. Yardley and the Birth of American Codebreaking /
Published 2008Subjects: “…Cryptographers United States Biography.…”
Full Text (via De Gruyter)
eBook -
2
The reader of gentlemen's mail : Herbert O. Yardley and the birth of American codebreaking /
Published 2004Subjects: Full Text (via ProQuest)
eBook -
3
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4
Alastair Denniston : code-breaking from Room 40 to Berkeley Street and the birth of GCHQ /
Published 2017Subjects:Book -
5
The reader of gentlemen's mail : Herbert O. Yardley and the birth of American codebreaking /
Published 2004Subjects:Book -
6
The woman all spies fear : code breaker Elizebeth Smith Friedman and her hidden life /
Published 2021Subjects: Full Text (via ProQuest)
eBook