Codes, ciphers, and secret writing. [electronic resource]
Material type: TextPublication details: New York : Pocket Books, 1974.Description: 114 p. : ill. ; 24 cmSubject(s): Online resources: Summary: Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink.No physical items for this record
Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink.
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