Codes & ciphers : hundreds of unusual and secret ways to send messages

Bibliographic Information

Codes & ciphers : hundreds of unusual and secret ways to send messages

Christina Ashton

Betterway Books, c1993

1st ed.

Other Title

Codes and ciphers

Available at  / 1 libraries

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Note

Includes bibliographical references (p. 105) and index

Fun kids 4

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