Secret Messages: A Collection of Puzzles Using Codes and Ciphers - Hardcover

Hawtin, Jeff

 
9780613955171: Secret Messages: A Collection of Puzzles Using Codes and Ciphers

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9780906212783: Secret Messages: Collection of Puzzles Using Codes and Ciphers

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ISBN 10:  0906212782 ISBN 13:  9780906212783
Publisher: Tarquin Publications, 1990
Softcover