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Codes and ciphers Open Library Codes and ciphers by Laffin, John.; 1 edition; First published in 1964; Subjects: Ciphers, Cryptography, Protected DAISY, In library
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Codes, Ciphers, And Secret Writing : Gardner, Martin . by John Laffin.. texts.. eye 40 favorite 0 comment 0 .. Community Texts.. 119 119.. 1972 Codes, Ciphers And Secret Writing .. Codes and ciphers : .