Codes, ciphers, and other secrets / Karin N. Mango.

Author: Mango, Karin N.

Imprint:New York : F. Watts, 1988.

Physical Description93 p. : ill. ; 23 cm.

Note:Includes index.

Note:Describes the many ways of hiding the real meaning of what someone is trying to say by using a code or replacing the message with a cipher.

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